jQuery Draggable bring to front

demo.html

<script type="text/javascript">
	$('.drag').bind('click',function(){ bringFront($(this), '.drag'); });
</script>

jqueryBringFront.js

function bringFront(elem, stack){
	// Brings a file to the stack front
	var min, group = $(stack);
	
	if(group.length < 1) return;
	min = parseInt(group[0].style.zIndex, 10) || 0;
	$(group).each(function(i) {
		this.style.zIndex = min   i;
	});
	
	if(elem == undefined) return;
	$(elem).css({'zIndex' : min   group.length});
}

Couple of sections where operators are missing, I added the + sign and works like charm.
Browser threw errors at Lines 8 and 12. Also I changed from 'click' to 'mousedown', the result being that your code would not change the z-Index until I released the mouse button, but this one does.
Commend your JS script, saved me a lot of headaches!