<script type="text/javascript"> function GetQueryString(name) { var url = "http://www.xxx.com/a.php?a1=xxx&b2=ccc&c3=zzz"; var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)"); var r = url.substr(1).match(reg); if (r!=null) return unescape(r[2]); return null; } alert(GetQueryString("a1")); alert(GetQueryString("b2")); alert(GetQueryString("c3")); </script>我alert a1 是null 值
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