var misca;
if (screen.availWidth > 800){misca = (screen.availWidth-800)/2;}

function centreaza()
{ 
//screen.availHeight
//screen.availWidth;
	for (i=1;i<=11;i++)
	{
		distsus=parseInt(document.getElementById("Layer"+i).style.top.replace("px",""))+25;
		document.getElementById("Layer"+i).style.top = distsus+"px"; 
		
		dist=parseInt(document.getElementById("Layer"+i).style.left.replace("px",""))+misca;
		document.getElementById("Layer"+i).style.left = dist+"px"; 
		
	}
}