function getQueryString(name) {if (location.href.indexOf("?") == -1 || location.href.indexOf(name + '=') == -1) {return '';}var queryString = location.href.substring(location.href.indexOf("?") + 1);var parameters = queryString.split("&");var pos, paraName, paraValue;for (var i = 0; i < parameters.length; i++) {pos = parameters[i].indexOf('=');if (pos == -1) { continue; }paraName = parameters[i].substring(0, pos);paraValue = parameters[i].substring(pos + 1);if (paraName == name) {return unescape(paraValue.replace(/\+/g, " "));}}return '';}