// JQuery : connaître la position d'un élément.
$(document).ready(function()
	{  

	jQuery.fn.extend({
	   findPos : function() {
	       obj = jQuery(this).get(0);
	       var curleft = obj.offsetLeft || 0;
	       var curtop = obj.offsetTop || 0;
	       while (obj = obj.offsetParent) {
		        curleft += obj.offsetLeft
		        curtop += obj.offsetTop
	       }
	       return {x:curleft,y:curtop};
	   }
	});
	
	});