viewer="";

function view(width,height,scrollbars)
	{
	if (viewer) viewer.close();
	var top=(screen.height-height)/2;
	var left=(screen.width-width)/2;
	viewer=window.open('','viewer','toolbar=0,menubar=0,scrollbars='+scrollbars+',resizable=0,top='+top+',left='+left+',width='+width+',height='+height);
	}