String.prototype.GetValue= function(para) {?
? ???var reg = new RegExp("(^|&)"+ para +"=([^&]*)(&|$)");?
? ???var r = this.substr(this.indexOf("\?")+1).match(reg);?
? ???if (r!=null) return unescape(r[2]); return null;?
??}?
??function getParamByName(name){
???var url=window.location.href;
???return url.GetValue(name);
??}