//注意url中要含?
 function getParameterByName(name, url) {
            if (!url) {
                url = window.location.href;
            }
            name = name.replace(/[\[\]]/g, "\\$&");
            var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
                results = regex.exec(url);
            if (!results) return null;
            if (!results[2]) return '';
            return decodeURIComponent(results[2].replace(/\+/g, " "));
        }
调用：getParameterByName("userID","?userID=JeoOrCXxyiOFxbYaGL40kw==&userPwd=sdFo2ziUw8HyLRKd4i6GAQ==&userName=高聪");
得到：userID值

 var parseQuery = function (query) {
            var reg = /([^=&\s]+)[=\s]*([^&\s]*)/g;
            var obj = {};
            while (reg.exec(query)) {
                obj[RegExp.$1] = RegExp.$2;
            }
            return obj;
        }
调用：

parseQuery("userID=JeoOrCXxyiOFxbYaGL40kw==&userPwd=sdFo2ziUw8HyLRKd4i6GAQ==&userName=高聪")
得到
aaarticlea/png;base64,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" alt="" />