JavaScript prototype ÊôÐÔ
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The prototype property allows you to add properties and methods to an
object.
prototypeÊôÐÔÔÊÐíÄãÏòÒ»¸ö¶ÔÏóÌí¼ÓÊôÐԺͷ½·¨
Syntax
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object.prototype.name=value
Example 1
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In this example we will show how to use the prototype property to add a
property to an object:
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<script type="text/javascript">
function employee(name,jobtitle,born)
{
this.name=name
this.jobtitle=jobtitle
this.born=born
}
var fred=new employee("Fred Flintstone","Caveman",1970)
employee.prototype.salary=null
fred.salary=20000
document.write(fred.salary)
</script>
The output of the code above will be:
Êä³ö½á¹ûΪ£º
20000
Ïà¹ØÎĵµ£º
ÖØµãÔÚÓÚfunction scroll()£¬function clipShow()¼°ÒÔÏÂforÑ»·¡£
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<style>
.new_newsT{
padding-top: 10px;
padding-bottom: 8px;
}
.new_newsT .list {
CLEAR: both; MARGIN: 0px 6px 0px 10px
}
......
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<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name=" ......
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var a = "hello";
var b = ",world";
var c = a.concat(b);
alert(c);
//c = "hello,world"
indexOf
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var index1 = a.indexOf("l");
//index1 = 2 ......
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