获取URL参数

function getUrlParam(sUrl, sKey) {     var param = sUrl.split('#')[0].split('?')[1];     if (sKey){//指定参数名称         var strs = param.split('&');         var arrs = new Array();//如果存在多个同名参数，则返回数组         for(var i = 0, len = strs.length; i < len; i++){             var tmp = strs[i].split('=');             if(tmp[0] == sKey){                 arrs.push(tmp[1]);             }         }         if (arrs.length == 1){//返回该参数的值或者空字符串             return arrs[0];         } else if (arrs.length == 0){             return "";         } else {             return arrs;         }     } else {//不指定参数名称，返回全部的参数对象 或者 {}         if(param == undefined || param == ""){             return {};         } else {             var strs = param.split('&');             var arrObj = new Object();             for(var i = 0, len = strs.length; i < len; i++){                 var tmp = strs[i].split('=');                 if (!(tmp[0] in arrObj)) {                     arrObj[tmp[0]] = [];                 }                 arrObj[tmp[0]].push(tmp[1]);                            }             return arrObj;         }     } }