Javascript里的类构造

Javascript里的类构造；以前不是很常用到，Javascript1.5有更多特性，可惜IE不支持。

自定义类：

<script language="javascript1.1">

//constructor;

function Alerter(aMsg,aTimes)

{

//properties;

this.mMsg=aMsg;

this.mTimes=aTimes;

//methods;

this.start=AlerterStart;

}

function AlerterStart()

{

var i;

for(i=0;i<this .mTimes;i++)

{

alert(this.mMsg+" time:"+(i+1));

}

return;

}

//instances;

var objAlerter=new Alerter("funny",5);

document.write("<a href="http://www.yaosansi.com/blog/\javascript:objAlerter.start();\>TEST GO!);</script>

添加或重写固有类的方法/属性：

<script language="javascript1.1">

//Array;

function Array_sum()

{

var t=0;

for(var i=0;i<this .length;i++)

{

t+=this[i];

}

return t;

}

//add a method;

Array.prototype.sum=Array_sum;

var a=new Array(1,2,3,4,5);

document.write("<a href="http://www.yaosansi.com/blog/\javascript:alert(a.sum());\>TEST GO!);</script>