将以下代码保存为：a.js
function querystring(){
this.params = new Object();
this.initialize = function(){
var param=this.paramstring();
if(param.length == 0) return;
if(param.substring(0,1)=='?'){
param=param.substring(1);
}
param = param.replace(/\+/g, ' ');
var args = param.split('&');
for (var i=0;i<args.length;i++){
var value;
var pair = args[i].split('=');
var name = unescape(pair[0]);
if (pair.length == 2)
value = unescape(pair[1]);
else
value = name;
this.params[name] = value;
}
};
this.get = function(key, defvalue){
return this.params[key]==null?defvalue:this.params[key];
};
this.paramstring = function(){
var col=document.getElementsByTagName("script");
var jsrc=col.item(col.length-1).src;
var i=jsrc.indexOf("?");
var words=jsrc.substr(i+1,jsrc.length);
return(words);
};
this.initialize();
}
var q = new querystring();
var a = q.get('a','defaultvalue'); //defaultvalue是默认值
var b = q.get('b','defaultvalue'); //defaultvalue是默认值
调用：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<script type="text/javascript" src="a.js?a=baidu&b=google"></script>
<title>无标题文档</title>
</head>
<body>
<!--
js运行结果将得到：
a=baidu
b=google
-->
</body>
</html>
是不是很有趣呢？呵呵～～
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