封装获取URL中的参数方法

代码

  //得到地址栏参数
    getQueryString:function(paras) {
        var url = location.href;
        var paraString = url.substring(url.indexOf("?") + 1, url.length).split("&");
        var paraObj = {}
        for (i = 0; j = paraString[i]; i++) {
            paraObj[j.substring(0, j.indexOf("=")).toLowerCase()] = j.substring(j.indexOf("=") + 1, j.length);
        }
        var returnValue = paraObj[paras.toLowerCase()];
        if (typeof (returnValue) == "undefined") {
            console.log(1)
            return "";
        } else {
            var decodeString = "";
            try {
                decodeString = decodeURIComponent(returnValue);
            }catch(e){
                decodeString = returnValue;
            }
            return decodeString;
        }
        /*  var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)");
          var r = window.location.search.substr(1).match(reg);
          if (r!=null) return decodeURI(r[2]); return null;*/
    },