从 URL 获取查询参数
代码语言：javascript复制 <script>
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, " "));
}
</script>
