<textarea id="test" style="display:none;">
www.baidu.html
www.baidu.htm
www.baidu.stml
www.baidu.xhtml
www.baidu.asp?id=1
www.baidu.aspx?id=1
www.baidu.php?id=1
www.baidu.jsp?id=1
www.baidu.aspx?id=1&type=2
www.baidu.aspx?id=1&type
</textarea>
<script type="text/javascript">
    function $(el){
        return typeof el == 'string' ? document.getElementById(el) : el;
    }
    var r = /www.+\s/g
    var data = $('test').value.match(r);
    
    var re = /^www\.\w+\.((?:x?html?|stml)|(?:[aj]spx?|php))(\?\w+=\w+((&\w+=\w+)*)?)?$/;
    for( var i = 0, len = data.length; i < len; i++ ){
        var s = data[i].replace(/\s/g, '');
        document.write( s + ' --------- '+ re.test(s) +'<br />' )
    }
</script>