String.prototype.getParameter = function (key) { var re = new RegExp(key + '=([^&]*)(?:&)?'); return this.match(re) && this.match(re)[1]; };
测试代码:
<script type="text/javascript"> <!-- String.prototype.getParameter = function (key) { var re = new RegExp(key + '=([^&]*)(?:&)?'); return this.match(re) && this.match(re)[1]; }; var s = "http://www.baidu.com/index.html?x0=0&x1=1&x2=2&x3=3&x4=http://www.google.com"; document.write(s.getParameter('x0') + "<br/>"); document.write(s.getParameter('x1') + "<br/>"); document.write(s.getParameter('x2') + "<br/>"); document.write(s.getParameter('x3') + "<br/>"); document.write(s.getParameter('x4') + "<br/>"); document.write(s.getParameter('undefined') + "<br/>"); //--> </script>
输出:
0
1
2
3
http://www.google.com
null