Detailed explanation of code examples for obtaining address bar parameters using javascript

用javascript获取地 址栏参数
//本页地址为：  alert(document.location);   
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 = "www.ceshi.org/index.htm?a=aaa&b=bbb&c=ccc";
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;
}
//应用实例：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 = "www.ceshi.org/index.htm?a=aaa&b=bbb&c=ccc";
 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"));
//-->

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