/**
*  Move a div on the X axis
* item 	{String} name of the div to move
* x 	{Int} new position on x axis
* t 	{Int} time to go to the x position (in millisec)
* i		{Int} number of the item to check if it's the last item
* max	{Int} total of items   
* @return nothing
*/
function moveNews(item,x,w,t,total){
	item.set('tween', {duration: t});
	for(var i=0;i<total;i++){
		$('buttonScroll'+i).src=  'images/bulletsOut.gif';
	}
	$('buttonScroll'+x).src=  'images/bulletsOver.gif';
	item.tween('margin-left', (x*w));				
}