JS获取地址栏参数的简单方法

<script type="text/javascript">
function getUrlPara(paraName){ 
 var sUrl  =  location.href;
 var sReg  =  "(?:\\?|&){1}"+paraName+"=([^&]*)"
 var re=new RegExp(sReg,"gi");
 re.exec(sUrl);
 return RegExp.$1;
}

//应用实例：test_para.html?a=11&b=22&c=33
alert(getUrlPara("a"));
alert(getUrlPara("b"));
</script>

源：http://www.cnblogs.com/jasonwbd/articles/1190870.html