Déplacé une info-bulle

function deplacenote(obj,event)
{
var e = event || window.event;
	var nx = e.clientx;
	var ny = e.clienty;
	
	if (clicenbas)
	{

		
		var diffx = parseint(oldx)-parseint(nx);
		var diffy = parseint(oldy)-parseint(ny);
		obj.style.bottom = (parseint(obj.style.bottom) + parseint(diffy))+'px';
		obj.style.left = (parseint(obj.style.left) - parseint(diffx)) +'px';
	}
	oldx = nx;
	oldy = ny;

}

<div class = "annotation" style = "z-index:<?php echo $i ?>; position : absolute; left:<?php echo $cx."px" ?>; top:<?php echo $cy."px" ?>" onmouseover="survolannotation(this, event);" onmouseout="finsurvolannotation(this, event);" >
	<a class = "infobulle<?php echo $type ?>" ondblclick= 'window.location.replace("editeur.php?id=<?php echo $id ?>&iddoc=<?php echo $iddoc ?>")'>
		<img src = "image/note.png" class="punaise"/>
		<span class = "bulle" onmousedown="clicsouris(1, event);" onmouseup="clicsouris(0, event)" onmousemove="deplacenote(this,event);" onclick = "fix(this,event);">
			<?php if ($contenu) echo $contenu ?>
			<img src = "<?php echo $chemin?>" />
		</span>
	</a>
</div>