Post on 06-May-2015
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JavaScript – Class 1Overview of the Basics
Objects• Properties• Methods• Events
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JavaScript Syntax
document.bgColor = “red”;
document.write( );
// change color to red
/* change color to red and write to the page */
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JavaScript Objects
Built in JavaScript ObjectsNavigator Object Date Object Math Object String Object Array Object
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JavaScript Objects
Browser Objects
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Where is JavaScript code placed?
<head>
<script type=”text/JavaScript” language="JavaScript"> <!- -
statements go here ; //-->
</script>
</head>
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Where is JavaScript code placed?
<head>
<script type=”text/JavaScript”>
statements go here ;
</script>
</head>
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Where is JavaScript code placed?
<head>
<script type=”text/JavaScript” src=”file.js”>
</script>
</head>
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Where is JavaScript code placed?
<head>
<script type=”text/JavaScript”> statements go here ;
</script>
<script type=”text/JavaScript” src=”file.js”>
</script>
</head>
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Where is JavaScript code placed?
<body>
<a href="#" onmouseover=“showPic();">click</a>
<a href=”javascript:openWin();”>click</a>
</body>
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<noscript>
You need JavaScript to see this page!
</noscript>
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Data and Types
Information that we process and displayCan be in many forms or types
Numeric String Boolean
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Variables
Hold information or dataCan hold these types of data
Numeric String Boolean
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How we create or declare a variable
var myName;
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Initializing a variable
var myName;
myName = “Teresa”;
_______________________
var myName = “Teresa”;
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Initializing a variable
var myAge;
myAge = 21;
_______________________
var zipCode;
zipCode = “92082”;
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The alert() method
alert();
window.alert();
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The alert() method
<head>
<script language="JavaScript"> alert ("This is an alert()"); </script>
</head>
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The alert() method
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The alert() method
<script language=”JavaScript”> var myFirstVariable; myFirstVariable = “Hello!”;
alert(myFirstVariable);
</script>
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The alert() method
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The write() method
<body>
<script language=”JavaScript”> document.write ("Hello World");</script>
</body>
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The write() method
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The write() method
<body>
<script language=”JavaScript”> document.write (‘Hello “Big” World’);</script>
</body>
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The write() method
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The write() method
<script language="JavaScript">var firstVar;var secondVar
firstVar = "Hello";secondVar = "World!";
document.write(firstVar + “ “ + secondVar);
</script>
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The write() method
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The write() method
<script language="JavaScript">var first;var last;
first = “Teresa";last = “Pelkie";
document.write(“<b>Hello “ + first + “ “ + last + “</b>”);
</script>
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The write() method
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JavaScript – Class 1
Assignment 1