Javascript获取地址参数

修改地址后的参数：

<script>

function getNewUrl(oldurl,paramname,pvalue){

var reg = new RegExp("(\\?|&)"+ paramname +"=([^&]*)(&|$)","gi");

var t=oldurl.match(reg)[0];

var retxt=t.substring(0,t.indexOf("=")+1)+pvalue;

if(t.charAt(t.length-1)=='&') retxt+="&";

return oldurl.replace(reg,retxt);

}

alert(getNewUrl("http://servername/virturlpath/index.asp?p1=123&p2=aa&p3=hh&p4=1","p4","cxz"));

</script>

获取地址参数：

<script>

function aa(source, name)

{

var reg = new RegExp("(^|\\?|&)"+ name +"=([^&]*)(\\s|&|$)", "i");

if (reg.test(source)) return RegExp.$2; return "";

};

alert(aa("http://community.csdn.net/Expert/topic/4223/4223277.xml?temp=6.502932E-02", "temp"))

</script>