var url = "index.php?a_id=123&pid=333";//location.href; var newags = "a_id"; var val = "4444"; url=url.replace(new RegExp("([?&]"+newags+"=)[^&]*","i"),"$1"+val); alert(url);
url = url.replace(/a_id=\d*/, "a_id=4444").replace(/pid=\d*/, "pid=333");
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