function checkC()
	{
	check = document.cookie;
	if(check.search("star_cookie=visit") == -1)
		{
		if(screen.width<=800)
		{
		var win = window.open("cat_instr.html","instructions","toolbar=no, location=no, directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=321,height=100,left=295,top=280");
		}
		if(screen.width==1024)
		{
		var win = window.open("cat_instr.html","instructions","toolbar=no, location=no, directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=400,height=100,left=390,top=330");
		}
		if(screen.width>1024)
		{
		lft=(screen.width-1024)/2+390;
		strl="toolbar=no, location=no, directories=no,status=no,menubar=no,scrollbars=no,resizable=no,width=400,height=100,left="+lft+",top=330";
		var win = window.open("cat_instr.html","instructions",strl);
		}

	date=new Date();
	m=date.getMonth();
	d=date.getDate();
	y=date.getFullYear();
	m+=3;
	date1= new Date(y, m, d);
	date2=date1.toGMTString();
	document.cookie="star_cookie=visit;expires="+date2;
	}
	}