Something

var x = 0;var y = 0;function mouseover(bla){        //var objX = findx(bla);	//var objY = findy(bla);	x = e.pageX;	y = e.pageY;		//x -= objX;	//y -= objY;	document.getElementById('thumb1').style.backgroundPosition = ''+(-165 + x)+'px ' + (-170 + y)+'px';}