Javascript 修改 URL 參數

<br /> String.prototype.changeQuery = function(name,value)<br /> {<br />var reg = new RegExp("(^|)"+ name +"=([^&]*)(|$)");<br />var tmp = name + "=" + value;<br />if(this.match(reg) != null)<br />{<br /> return this.replace(eval(reg),tmp);<br />}<br />else<br />{<br /> if(this.match("[/?]"))<br /> {<br />return this + "&" + tmp;<br /> }<br /> else<br /> {<br />return this + "?" + tmp;<br /> }<br />}<br /> }<br /> var href = 'http://dlib.apabi.com/?Token=44AB&cult=CN&orgid=pku';</p><p> alert("old url is -- "+href);<br /> href = href.changeQuery("cult","US");<br /> alert("new url is -- "+href);