function SC_alt(){
	var maxX  =  document.documentElement.clientWidth;
	var maxY  =  document.documentElement.clientHeight;
	var y=0;
	var x=0;
	if(maxY>600){
		y	= (maxY - 600)/2+460;
	}else{
		y	= 600-(600 - maxY)/2-140;
	}
	if(maxX>1002){
		x	= (maxX - 1002)/2;
	}else{
		x	= 1002 - (1002 - maxX)/2 - 965;
	}
	$("#divId").css("left",x+"px");
	$("#divId").css("top",y+"px");
}
$(document).ready(function(){
	setInterval("SC_alt()",100);
})