js正则匹配多个img链接

<script language="JavaScript">
<!--
        var s='...<img src="image1.gif" width="100">.abc.<img height="100px" src="image2.gif">...';
        var reg = /<img[^>]+src="[^"]+"[^>]*>/g;
        var result = s.match(reg);    //获得所有的img标签
        for (var i=0; i<result.length; i++) {
                var reg2 = /src="([^"]+)"/;
                var result2 = reg2.exec(result);  //匹配src
                alert(RegExp.$1);  
        }
//-->
</script>