js获取url中的参数值

 function QueryString(fieldName) {
            var urlString = document.location.search;
            if (urlString != null) {
                var typeQu = fieldName + "=";
                var urlEnd = urlString.indexOf(typeQu);
                if (urlEnd != -1) {
                    var paramsUrl = urlString.substring(urlEnd + typeQu.length);
                    var isEnd = paramsUrl.indexOf('&');
                    if (isEnd != -1) {
                        return paramsUrl.substring(0, isEnd);
                    }
                    else {
                        return paramsUrl;
                    }
                } else { return null; }
            } else { return null; }
        }

 

转载于:https://www.cnblogs.com/S-design/archive/2012/07/17/2594704.html