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:
ÔÚÏÂÃæµÄÀý×ÓÖУ¬ÎÒÃǽ«ÑÝʾÈçºÎÓÃprototypeÊôÐÔÀ´ÏòÒ»¸ö¶ÔÏóÔö¼ÓÒ»¸öÊôÐÔ£º
<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
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1. CSS
<style>
.dstyle1 {
font-size:13px;
font-weight: bold;
color: #ff6600;
}
.dstyle2 {
font-size:13px;
font-weight: bold;
color: #ffffff;
}
</style>
2. JavaScript
<script type="text/javascript">
m();
function m()
{
document.getElementById("span_new").classNa ......
JavascriptË¢ÐÂÒ³ÃæµÄ¼¸ÖÖ·½·¨£º
1 history.go(0)
2 location.reload()
3 location=location
4 location.assign(location)
5 document.execCommand('Refresh')
6 window.navigate(location)
7& ......