function pop(width, height, center, under, id, campid)
{	//variable declarations
	var scrW, scrH, left, top, opt, dest, pop;
	if (center == "1") {	//calculate center WxH
		scrW = window.screen.width;
		scrH = window.screen.height;
		left = (scrW / 2) - (width / 600);
		top = (scrH / 2) - (height / 800);
	}
	else {
		left = 50;
		top = 50;
	}
	// all the options
	opt = "width="+width+",height="+height+",lebeft="+left+",top="+top+",resizable";
	dest = "http://ebooks.vipvoy.com?"+campid+"&id="+id;
	pop = window.open(dest,'cs_pop',opt);
	if (under == "1") { //pop under
		pop.blur();
		window.focus();
	}
	else { //pop up
		window.blur();
		pop.focus();
	}
}