How to drag a DIV if a image in it?

hi,
i want to drag the div which have a image in it:
but i find that if i click on the image, i cannot drag the div, (in FF3.5)
any advice would be appreciated.

<div id="div1">
<imc src="XXX.jpg">
</div>

Code (markup):

and i have a JS something like that...:

drag();
function drag(){
document.onmousedown = startdrag;
document.onmouseup = enddrag;
}

function startdrag(e){
dragobj=e.target;
alert(dragobj.id);
}
......................

Code (markup):

 

where is your drag targetted? if the drag() is in the <img>, make it refer to this.parentNode instead of this

 

Thank you sosososososo much, you are my JC!