Get Attribute for image

getting attr without ID

HTML

<script src="http://4.bp.blogspot.com/-uyvTMZ3dFPs/UKHsc_ZbysI/AAAAAAAACvo/QdVAlVBbUxE/s320/1hello.jpg"></script>
<img src="http://4.bp.blogspot.com/-uyvTMZ3dFPs/UKHsc_ZbysI/AAAAAAAACvo/QdVAlVBbUxE/s320/1hello.jpg" width='400' height='400' alt='Sample_image' onClick='imageInfo(this);'>

JavaScript

$('img').filter(function(){
        alert($(this).attr('src'));
    });