SO jQuery Fiddle

Test Fiddle mainly for SO Questions jQuery 1.4.3, UI 1.8.5

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.5/themes/ui-lightness/jquery-ui.css">

JavaScript

var str = "www.example.com/index.php?a=1&b=2&c=3";
str = str.substring(str.indexOf("?") + 1);
alert(str);