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Cards (251)
Section 1
(50 cards)
numbers + strings =? 5+"5" = ?
strings 55
javascript starts counting on what?
0
The while loop (a loop executed when a specific condition is met) syntax?
while(variable<=endvalue) { code to be executed }
the last index in a string is?
string.length-1
javascript comment syntax?
/**/ for multiple lines // for a single line
indexOf() method does?
returns the position of the first found occurrence of a specified value in a string e.x. string.indexOf(searchstring,start) x="hello world" document.write(x.indexOf("world",0))-->7
if a variable is not a function and does not have var then it is?
a global variable
string object methods
...
split() method does what?
splits a string into an array of substring and returns the new array e.x. string.split(separator,limit) x="hello world" document.write(x.split(" ",1))---> hello
javascript syntax for a (limited loop based on specifications) syntax?
for(variable=startvalue;variable<=endvalue;variable=variable+increment) { code to be run until loop is complete. }
HTML DOM mouse events?
onclick ondblclick mousedown mousemove mouseover mouseout mouseup
what is an array?
an object used to store multiple values in a single variable.
charAt() method does?
returns the character at the specified index e.x. string.charAt(index) x="hello world" document.write(x.charAt(0))-->h
the break and continue statement?
if(i==3) { break; } breaks loop if(i==3) { continue; } breaks loop and restarts at next value;
conditional variable syntax?
z=(x==y)?5:6 z = 5 if x=y; z = 6 if x!=y;
search() method does what?
searches for a match between a regular expression and the string and returns the position e.x. string.search(regexp) x="hello world" document.write(x.search("wo"))--->7
can variables include other variables?
yes
logical operators?
&& [and] || [or] ! [not]
function syntax and purpose?
function functionName(var1,var2,..,var99) { some code } functions allows scripts to be executed when called.
valueOf() method does what?
returns the primitive value of a string. e.x. string.valueOf() x= "Hi!" document.write(x.valueOf())----> Hi!
alert box syntax?
alert("message");
calling an external javascript file syntax?
<script type="text/javascript" src="javascript.js"> </script>
confirm box syntax?
r=confirm("press a button") if(r==true) { alert('you pressed ok!'); } else { alert('you pressed cancel'); }
onsubmit should be used for what and where?
validating form fields ex. <form action="blah.asp" method="post" onsubmit="return checkForm()">
prompt box syntax?
x="prompt("text here","default value"); if(x!="null" && x!="") { alert("hello "+x+" how are you today?") }
substr() does what?
same as substring except uses length as opposed to a stop number e.x. string.substr(start,length) x="hello world" document.write(x.substr(0,4))--->hello
concat() method does?
joins 2 or more strings then returns a copy. e.x. string.concat(string2) x="hello world " y="goodbye world" document.write(x.concat(y))--> hello world goodbye world
properties of methods defined?
properties - are values associated with an object i.e. length methods - are actions (functions) that can be performed on objects ie toUpperCase [an uppercase method]
match() method does?
searches for a match between the regexp and a string and returns the matchs e.x. string.match(regexp) x="hello world" document.write(x.match("hello"))-->hello
object based programming what does this mean?
objects have properties & methods for example { var txt="Hello World!"; document.write(txt.length) } gives the property of length of txt and writes it to the doc which is 12.
replace() method does what?
searches for a regexp or substring and replaces it with a new string. e.x. string.replace(regexp/substr,newstring) x="hello world" document.write(x.replace("hello","goodbye"))-->goodye world
x=x+y is the same as what? or x=x/y?
x+=y or x/=y
toLowerCase() method does what?
converts a string to lowercase letters e.x. string.toLowerCase() x="BLAH" document.write(x.toLowerCase())---->blah
special text insertions?
\' single quote
\" double quote
new line
\r carriage return
\t tab
\b backspace
\f form feed
Is javascript case sensitive?
yes!
slice() method does what?
extracts a part of a string and returns the extracted part in a new string(-1 if null) e.x. string.slice(begin,end) x="hello" document.write(x.slice(0,3))---> hell
fromCharCode() method does what?
converts unicode values into characters [does not use strings] document.write(string.fromCharCode(72))--> H
types of strings object properties
constructor- returns the function that created the objects prototype. length- returns the length of characters of a string. prototype-allows you to add properties and methods to an object.
lastIndexOf() method does what?
returns the position of the last occurence of a specified value in a string. e.x. string.lastIndexOf(regexp,start) x="hello world" document.write(x.lastIndexOf("wo",0))--->7
numerical comparison operators?
x==y [x is equal to y] x===y [x is exactly equal to y] != [not equal to] > [greater than] < [less than] >= [greater than or equal to] <= [less than or equal to]
else if conditional syntax?
if(condition) { code } else if(condition) { code }
return statement syntax?
function product(a,b) { return a*b; } alert(product(4,3)) <-- will alert 12 return function gives a value back based on function variables.
for... in statement syntax?
var person={fname:"john",lname:"doe",age:"25"}; var x; for (x in person) { document.write(person[x]+" "); } ------- loops through all variables attached to person;
switch statement syntax?
switch(variable) { case 1; code break; case "example"; code break default; code }
making a global (multiple) case insensitive search?
/content goes here/g; var x = /money/g
substring() does what?
extracts characters from a string between two specified #'s and returns it as a new string. [start at 0] e.x. string.substring(from,to) x="hello world" document.write(x.substring(0,4))--->hello
syntax for line breaks in an alert box?
'/n' + " here"
how to make a case sensitive (single) search?
("w3schools") - case sensitive (/w3schools/) - case insensitive /content/;
toUpperCase() method does what?
converts a string to uppercase letters e.x. string.toUpperCase() x="blah" document.write(x.toUpperCase())---->BLAH
charCodeAt() method does?
returns the unicode of the character at a specific index in a string. e.x. string.charCodeAt(index) x="hello world" document.write(x.charCodeAt(0))--->72
Section 2
(50 cards)
reverse() method does?
reverse the order of elements in an array (first is last, last is first) array.reverse() x=["1","2","3"] x.reverse() document.write(x)-->3,2,1
what does sin() do?
returns the sine of a number (-1 to 1) Math.sin(number) document.write(Math.sin(3))-->0.1411
creating a literal array?
var x = ["black","white","red","blue","green"]
LOG10E
base-10 logarithm of E approx (0.434)
parseInt() does what?
gets a number from a string [not part of the math object] parseInt(string) document.write(parseInt("45.1nn"))-->451 document.write(parseInt("45nn"))-->45
LN2 is what?
natural logarithm of 2 approx (0.693)
unshift() method does what?
adds new elements to the beginning of an array and returns new length array.unshift(ele1,ele2,...,ele99) x=["1","2","3"] document.write(x.unshift("4"))-->4
what does exp() method do?
returns the value of a user-defined power to eulers number Math.exp(number) document.write(Math.exp(1))-->2.7183
sort() method does what?
sorts the elements of an array (alphabetical default) [changes original] array.sort(sort function) x=["a","b","c"] y=["a","c","b"] document.write(y.sort())-->a,b,c
the boolean has a default value of?
true
how to access an array?
string[array index]
PI is what?
PI approx (3.14159)
what does ceil() method do?
rounds a number upwards to the nearest interger and returns the result Math.ceil(number) document.write(Math.ceil(2.3))--> 3
Math object methods
...
what does abs() method do?
determines the absolute value of x Math.abs(x) document.write(Math.abs(-7))-->7
creating an uncondensed array?
var x = new Array(); //regular array x[0] = "black"; x[1] = "white"; x[2] = "green"; x[3] = "yellow"; x[4] = "blue"; x[5] = "red";
shift() method does what?
removes the first elements in an array and returns it [alters original] array.shift() x=["1","2","3"] document.write(x.shift())--->1 document.write(x)--->2,3
sort() for numbers?
sorting by numbers is different, using a sort function is necessary. function sortNumber(a,b) { return b-a;// for descending return a-b;// for ascending }
7 values that make boolean false
0 -0 null " " false undefined NaN <-- not a number
what does min() method do?
returns the number with the lowest value Math.min(x,y,z) document.write(Math.min(10,5,-1))-->-1
what does the method tan() do?
returns the tangent of a number Math.tan(number) document.write(Math.tan(90))-->-1.995
what does sqrt() do?
returns the square root of a number Math.sqrt(number) document.write(Math.sqrt(9))-->3
the Math object allows you to?
perform mathematical equations and tasks.
toString() method does what?
converts an array to a string, returns the result x=["1","2","3"] document.write(x.toString())-->1,2,3
join() does what?
joins all elements of an array into a string array.join(seperator) x=["1","2","3"] document.write(x.join(" and ")) --> 1 and 2 and 3
what does atan2() method do?
returns the arctangent between positive x-axis and the point Math.atan2(x,y) document.write(Math.atan2(8,4))-->1.1071
concat() method does what?
joins 2 or more arrays array.concat(array2)
SQRT2 is what?
square root of 2 approx (1.414)
parseFloat() does what?
gets a decimal number from a string [not part of the math object] parseFloat(string) document.write(parseFloat("45.1nn"))-->45.1 document.write(parseFloat("45nn"))-->45
SQRT1_2 is what?
square root of 1/2 approx (0.707)
what does floor() method do?
rounds a number to down to the nearest interger Math.floor(number) document.write(Math.floor(5.3))-->5
what does acos() method do?
returns the arccosine of a number in radians Math.acos(x) document.write(Math.acos(0.64))-->0.87629
what does cos() method do?
returns the cosine of a number Math.cos(number) document.write(Math.cos(3))-->-0.9899
what does the log() method do?
returns the natural logarithm (base E) of a number Math.log(number) document.write(Math.log(2))-->0.6931
what does the random() method do?
returns a random number between 0 and 1 [use .floor() and * to get a higher number] Math.random() document.write(Math.random())-->0.57
what does the max() method do?
returns the number with the highest value Math.max(x,y,z) document.write(Math.max(10,5,-1))-->10
what does atan() method do?
returns the arctangent of a number in radians Math.atan(x) document.write(Math.atan(2))-->1.1071
creating a condensed array?
var x = new array ("white","black","red","green","blue") //condensed array
what does pow() method do?
returns the value of x to the power of y Math.pow(x,y) document.write(Math.pow(4,2))-->16
Math object properties
...
pop() does what?
removes the last element of an array and returns it [alters original] array.pop() fruits=["apple","nana","grape","orange"] document.write(fruits.pop())-->orange document.write(fruits())-->apple,nana,grape
push() method does what?
adds new elements to an array [alters original] array.push(ele1,ele2,..,ele99) x=["1","2","3"] x.push("4") document.write(x)-->1,2,3,4
array object methods
...
what does round() method do?
rounds a number to the nearest interget Math.round(x) document.write(Math.round(5.5))-->6 document.write(Math.round(5.49))-->5
slice() method does what?
selects a part of an array and returns an array [starts from 0, original not changed] array.slice(begin,length) x=["1","2","3"] document.write(x.slice(0,2))-->1,2
the purpose of the boolean object?
to convert a non-boolean value to a boolean value (true or false) value.
LN10 is what?
natural logarithm of 10 approx (2.302)
valueOf() method does what?
returns the primitive value of an array array.valueOf()
LOG2E is what?
base-2 logarithm of E approx (1.442)
e is what?
eulers numbers approx (2.718)
Section 3
(50 cards)
regexp object methods
...
. meta char does what?
finds a single character (can be used in combination) except newline or other line terminators x="hello world" y=/h.l/g document.write(x.match(y))--> hel
what does the n* quantifier do?
matches any string that contains zero or more occurrences of n x="hello world" y=/lo*/g document.write(x.match(y))--> lo,l
what does the global property do?
specified if the "g" modifier is set /regexp/g
RegExp modifiers
...
\d meta character does what?
finds a digit from 0-9 x="hell1o world" y=/\d/g document.write(x.match(y))--> 1
what does the test() method do?
tests for a match in a string, returns true or false (true if found, false if not) y=/regexp/ y.test(string)
How do you assign the value from a prompt to a string?
var stringVar = prompt("Text Here");
what does the n{x} quantifier do?
matches any string that contains a sequences of x n's x="100, 1000 or 10000" y=/\d{4}/g document.write(x.match(y))--> 1000,1000
booleans only non-primitve is what?
toString() boolean.toString()
what does the source property do?
returns the source of the regexp x=/regexp/gi document.write(x.source)-->regexp
\W meta character does what?
finds a non-word character x="hello world!%" y=/\W/g document.write(x.match(y))--> !,%
what does the lastIndex property do?
specified the index at which to start the next match [specified character position after last match] x="string string string" y=/regexp/gi while(y.text(x)==true) { document.write("i found the index at: " + y.lastIndex) } firstmatch index number, second match index number
what does the n{x,y} quantifier do?
matches any string that contains a sequence of X to Y n's [x and y must be #'s] x="100, 1000 or 10000" y=/\d{4,5}/g document.write(x.match(y))--> 1000,10000
\D meta character does what?
used for find a non-digit character x="hello world9" y=/\D/g document.write(x.match(y))--> h,e,l,l,o, ,w,o,r,l,d
\B meta character does what?
find a match that is not at the beginning of a word (or returns null) x="hello world" y=/\Borld/g document.write(x.match(y))--> orld
meta chracter does what?
used to find a newline character (only useful in alert text)
x="hello
world"
y=/
/g
document.write(x.search(y))--> 5
what does the n? quantifier do?
matches any string that contains zero or one occurences of n x="hello world" y=/lo?/g document.write(x.match(y))--> lo,l
regexp brackets
find a range of characters
what does the exec() method do?
tests for a match in a string (returns matched text if found null if not) y=/regexp/ y.exec(string)
finding browsers and app.name?
navigator.appName - name navigator.appVersion - version #
\s meta character does what?
finds a whitespace chracters x="hello world " y=/\s/g document.write(x.match(y))--> , ,
bracket examples
[new RegExp("[abc]") or /[abc]/] [abc] - find any character between bracks [^abc] - find any char not in bracks [0-9] - find any digit 0-9 [A-Z] - find any char from uppercase A to uppercase Z [a-z] - find any char from lowercase a to lowercase z [A-z] - find any char from uppercase A to lowercase Z (red|blue|green) - find any of the alternations specified
regexp quantifiers
can be used in conjunction with metacharacters
determining if cookies are enabled?
navigator.cookieEnabled - true or false
\w meta character does what?
finds a word character (a-z,A-Z,0-9) x="hello world!%" y=/\w/g document.write(x.match(y))--> h,e,l,l,o, ,w,o,r,l,d
what does the n$ quantifier do?
matches any string with n at the end x="hello world" y=/ld$/g document.write(x.match(y))--> ld
what is a cookie?
a cookie is a variable that is stored on a users computer.
what does the ignoreCase property do?
specified if the "i" modifier is set /regexp/i
\0 meta character does what?
finds a nul character
can javascript detect a browser type?
yes and version.
What is the command to display a prompt?
prompt("Text Here");
How do you assign the value from a prompt to a non-string variable?
Using a parse. Example : var intVar = parseInt(prompt("Text Here"));
\S meta character does what?
used to find a non-whitespace character x="hello world" y=/\S/g document.write(x.match(y))-->h,e,l,l,o,w,o,r,l,d
what does the i modifier do?
performs a case insensitive search /regexp/i x="hello world" y=/world/i document.write(x.match(y))--> world
what does the n{x,} quantifier do?
matches any string that contains a sequence of atleast X n's [x must be a number] x="100, 1000 or 10000" y=/\d{3,}/g document.write(x.match(y))--> 100,1000,10000
\b meta character does what?
used to find a match at the beginning or end of a word (if none null) x="hello world" y=/\bworld/g document.write(x.match(y))--> world
regexp object properties
...
what does the ^n quantifier do?
matches any string with n at the beginning x="hello world" y=/^he/g document.write(x.match(y))--> he
how is regexp defined?
var patt = new RegExp(pattern,modifiers) or var patt = /pattern/modifiers
regexp means what?
regular expression
what does the n+ quantifier do?
matches any string that contains at one n x="hello world" y=/w+/g document.write(x.match(y))--> hello,world
what does the compile() method do?
[edits source] the compile method is used to compile and recompile a regexp y=/regexp/ y.compile(regexp,modifier)
what are regexp modifiers?
used to perform case-insensitive and global searches
what does the g modifier do?
performs a global match (instead of stopping at first found) /regexp/g x="hello world" y=/o/g document.write(x.match(y))--> o,o
regexp metacharacters
are characters with a special meaning
what deos the ?!n quantifier do?
matches any string that is not follwed by specific string n x="hello world" y=/hello(?!world)/g document.write(x.match(y))-->
what does the ?=n quantifier do?
matches any string that is followed by a specific string of n x="hello world" y=/hello(?=world)/g document.write(x.match(y))--> hello
is there a standard that applies to the navigator object?
no, therefore determining browsers becomes quite an ordeal.
what is a regular expression?
an object that describes a pattern of characters
Section 4
(50 cards)
How do you assign the return value of confirm() to a variable?
var answerVar = confirm("Message Text Here");
For radio buttons, how do you get the current checked status of the control?
document.getElementById("radioButtonId").checked;
For textboxes, how do you set focus on the control?
document.getElementById("TextBoxId").focus;
What are the four attributes of the <script> tag?
Type, Src, Charset, and Defer
How do you code an If Else If statement in JavaScript?
if (condition) { } else if (condition) {}
How do you create a function in JavaScript?
var functionName = function(param1, param2, paramN) {}
For textboxes, How do you get the current value?
document.getElementById("TextBoxId").value;
For a text area, how do you get the current character count for the control?
var areaText = document.getElementById("textAreaId").value; var charCount = areaText.length;
What are the two methods common to most controls?
focus //Brings focus to the control blur //Removes focus from the control
How do you make the browser load a new page using JavaScript?
window.location = "New Web Address Here";
How do you create a Date object in JavaScript?
var dateVar = new Date();
How do you code an If Else statement in JavaScript?
if (condition){ } else {}
How do you create an Array object in JavaScript?
var arrayVar = new Array();
How do you denote a string in JavaScript
With either single or double quotes surrounding the data
How do you create a function that returns a value in JavaScript?
var functionName = function(param1, param2, paramN) { //Other steps return returnValue; }
What is the <noscript> tag used for?
The text between the opening and closing tag is displayed if JavaScript is disabled or otherwise not available
For a text area, how do you get the current value of the control?
document.getElementById("textAreaId").value;
What method allows you to set the digit precision of a decimal number?
toFixed(digitCount);
How do you display a confirmation?
confirm("Message Text Here");
In the <script> tag, how is the Src attribute used?
<script src="fileName.js"> //Used to denote external file for script use
How do you access a page element by id?
document.getElementById(id);
How do you code a for statement in JavaScript?
for (counter; condition; incrementor) {}
For lists, how do you get the value or the currently selected item?
document.getElementById("listId").value;
How do you display an alert?
alert("Alert Text Here");
For radio buttons, how do you get the text value of the control?
document.getElementById("radioButtonId").value;
What is AJAX?
Asynchronous JavaScript And XML
How do you create a single line comment in JavaScript?
With two forward slashes "//"
For textboxes, How do you set the control to be disabled?
document.getElementById("TextBoxId").disabled = true; //Could also be false to enable it
How do you code a button.onclick event handler?
document.getElementById("ButtonId").onclick = functionName;
What is the string escape sequence to start a new line in JavaScript?
How do you assign actions to the window onLoad event?
window.onload = function() {//actions here}
How do you write a line to the current element of the DOM?
document.writeln("Text Here"); //Advances to new line after text
What values can confirm() return?
True or false
In the <script> tag, how is the Type attribute used?
<script type="text/javascript"> //Used to denote the type of script being used. Always this for JavaScript
How do you code a while statement in JavaScript?
while (condition) {}
How do statements end in JavaScript?
With a semicolon ";"
What is an event handler?
A function that is called with a certain event occurs. Examples of these include button.onclick and window.onload.
In the <script> tag, how is the Defer attribute used?
<script defer="defer"> //Used to ensure the code doesn't run until the rest of the page has been loaded
For checkboxes, how do you get the current checked status of the control?
document.getElementById("checkboxId").checked;
For checkboxes, how do you get the text value of the control?
document.getElementById("checkboxId").value;
How do you test that a variable contains a valid number?
isNaN(varHere); //Returns true or false.
How do you code an If statement in JavaScript?
if (condition) {}
What are the valid characters for an identifier in JavaScript?
Letters, Numbers, Underscores, and Dollar Signs
How do you write text to the current element of the DOM?
document.write("Text Here"); //Remains on current line
How do you view the current web address using JavaScript?
window.location();
Is JavaScript case sensitive?
Yes
How do you create a multi-line comment in JavaScript?
Start with a forward slash and asterisk, and then end with an asterisk and forward slash. "/" "/"
How do you assign a default value to a prompt?
Using the second parameter. Example: prompt("Enter Age:", "18");
What is the DOM?
Document Object Model
How do you declare a variable in JavaScript?
var variableName;
Section 5
(50 cards)
What is the format to create a new Date object from a string?
var dateObject = new Date("11/22/2012 18:25:35");
How do you alter the value of the text element in a span tag?
document.getElementById("spanId").firstChild.nodeValue = "New Value";
What is the string escape sequence to insert a double quote in JavaScript?
\"
What is the identity operator for equals?
===
What Math object method is used to return the lowest value for a set of supplied numbers?
Math.min(var1, var2, varN);
What String object method returns a new string containing the value of the original string but in all lower case?
toLowerCase();
What String object method is used to return a new string that contains part of the original string from the specified start position and up to but not including the specified stop index?
substring(startIndex, stopIndex); //stopIndex is optional, if it is not specified, then it will go until the end of the string
What is the syntax of a conditional operator?
(Condition_Expression) ? Value_If_True : Value_If_False;
What is the string escape sequence to insert a carriage return in JavaScript?
\r
What Math object method is used to return a given number that has been rounded to the closes integer value?
Math.round(number);
What are the available get methods for a Date object?
getTime(); getFullYear(); //Returns 4 digit year getMonth(); //Returns months, starts with 0 for January getDate(); // Returns day of the month getHours(); //Returns hours in the day getMinutes(); //Returns the minutes in the current hour getSeconds(); //Returns seconds in the current minute getMilliseconds(); //Returns milliseconds in the current second
What is the string escape sequence to insert a form feed in JavaScript?
\f
What Number object method is used to return a string with a given number base?
toString(base); //Bases can range from 2 to 36
What is the identity operator for not equal?
!==
What String object method is used to return a new string that contains part of the original string from the specified start position?
substring(startIndex);
What is the string escape sequence to insert a tab in JavaScript?
\t
What are the 3 shortcuts for Number object properties?
Infinity //Represents Number.POSITIVE_INFINITY -Infinity //Represents Number.NEGATIVE_INFINITY NaN //Represents Number.NaN
What String object method returns a new string containing the value of the original string but in all upper case?
toUpperCase();
What is the string escape sequence to insert a backslash in JavaScript?
\\
What Math object method is used to return a random number?
Math.random() //Returns a value >= 0.0 but <1.0
How do you create a new Date object?
var dateObject = new Date(year, month, day, hours, minutes, seconds, milliseconds);
What is the string escape sequence to insert a vertical tab in JavaScript?
\v
What Date object method is used to return a string containing the time?
toTimeString();
What is the escape sequence used to insert a Unicode character into a string in JavaScript?
\udddd //"dddd" is replaced by the hexadecimal value for the Unicode character
What String object method is used return the position of the first instance of a specified search string, starting from the specified index?
indexOf(searchValue, startPosition); //If no startPosition is specified, the search begins from the start of the string
What Math object method is used to return the absolute value of a given number?
Math.abs(number);
What is the format for a switch statement in JavaScript?
switch (inputVar) { case "caseSwitch1": //Operations here //No break so it cascades to caseSwitch2. case "caseSwitch2": //Operations here break; //Break so it will not continue to cascade down. }
How do you concatenate multiple parts into a string?
var stringVar = "part 1:" + "part 2";
What Math object method is used to return a given number rounded to the next lowest integer value?
Math.floor(number);
What Math object method is used to return the square root of a given number?
Math.sqrt(number);
What Date object method is used to return the number of milliseconds since the start of GMT?
getTime();
What Date object method is used to return a string containing the date?
toDateString();
What String object method is used to get the character at a specified index position?
charAt(position);
What String object method is used to concatenate multiple strings?
concat(var1, var2, varN);
What Number object method is used to round numbers to the specified number of decimal places?
toFixed(digits);
What Date object method is used to return a string containing the date and time?
toString();
What is the string escape sequence to insert a single quote in JavaScript?
\'
What makes the identity operators different from the standard equality operators?
They do not perform type coercion. //Eg. If data types don't match they fail the comparison
For checkboxes, how do you set the current checked status of the control?
document.getElementById("CheckboxId").checked = true; //Could also be false
What Number object method is used to return a numerical string with the specified number of significant digits?
toPrecision(precision);
What Math object method is used to return a given number rounded to the next highest integer value?
Math.ceil(number);
What are the available set methods for a Date object?
setFullYear(); //Sets 4 digit year setMonth(); //Sets months, starts with 0 for January setDate(); // Sets day of the month setHours(); //Sets hours in the day setMinutes(); //Sets the minutes in the current hour setSeconds(); //Sets seconds in the current minute setMilliseconds(); //Sets milliseconds in the current second
What Math object method is used to return the highest value from a set of supplied numbers?
Math.max(var1, var2, varN);
What Number object method is used to return a number in exponential format with the specified number of decimal places?
toExponential(digits);
What Math object method is used to return a given number raised to a given power?
Math.pow(number, power);
For a text area, how do you set the current value of the control?
document.getElementById("textAreaId").value = "Text Value";
For radio buttons, how do you set the current checked status of the control?
document.getElementById("radioButtonId").checked = true; //Could also be false
What are the available properties for the Number object?
Number.MAX_VALUE Number.MIN_VALUE Number.POSITIVE_INFINITY Number.NEGATIVE_INFINITY Number.NaN
How do you access the text element in a <span> tag?
document.getElementById("spanId").firstChild;
What are the events common to most controls?
onfocus //Fired when control receives focus onblur //Fired when control loses focus onclick //Fired when the control is clicked ondblclick //Fired when the control is double clicked onchange //Fired when the control's value is changed onselect //Fired when text is selected in a textbox or text area
Section 6
(1 card)