如何用javascript獲取地址欄參數(shù)

    本文列舉了用javascript獲取地址欄參數(shù)的三種方法：
    方法一：
    <script type="text/javascript">
    <!--
    String.prototype.getQuery = function(name) {
    var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
    var r = this.substr(this.indexOf("\?")+1).match(reg);
    if (r!=null) return unescape(r[2]); return null;
    }
    var strHref = "";
    alert(strHref.getQuery("a"));
    alert(strHref.getQuery("b"));
    alert(strHref.getQuery("c"));
    //-->
    </script>
    方法二：
    <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;
    }
    //應(yīng)用實(shí)例：test_para.html?a=11&b=22&c=33
    alert(getUrlPara("a"));
    alert(getUrlPara("b"));
    </script>
    方法三：
    <script type="text/javascript">
    <!--
    function Request(strName){
    var strHref = "";
    var intPos = strHref.indexOf("?");
    var strRight = strHref.substr(intPos + 1);
    var arrTmp = strRight.split("&");
    for(var i = 0; i < arrTmp.length; i++) {
    var arrTemp = arrTmp[i].split("=");
    if(arrTemp[0].toUpperCase() == strName.toUpperCase()) return arrTemp[1];
    }
    return "";
    }
    alert(Request("a"));
    alert(Request("b"));
    alert(Request("c"));
    //-->
    </script>