function popup(v,i,s,f) {
	var t,x,y;
	var winW = (document.layers)? window.innerWidth : document.body.offsetWidth-20;
	var winH = (document.layers)? window.innerHeight : document.body.offsetHeight-4;
	if(v=="show") {
		if(document.all) {
			y = (event.clientY - event.offsetY);
			if(y > 0)
				y += document.body.scrollTop;
			else
				y = document.body.scrollTop;
			document.all[s].style.top = y+5;

			x = (event.clientX - event.offsetX);
			if(x > 0)
				x += document.body.scrollLeft + document.images[i].width;
			else
				x = document.body.scrollLeft;
			document.all[s].style.left = x+5;
			
			if((x + document.images[f].width) > winW) {
				document.all[s].style.top = y + document.images[i].height;
				document.all[s].style.left = winW - document.images[f].width;
			}
			document.all[s].style.visibility = "visible";
		}
		else {
			if(document.images[i].y > self.pageYOffset)
				y = document.images[i].y;
			else
				y = self.pageYOffset;
			document.layers[s].top = y+5;

			if(document.images[i].x > self.pageXOffset)
				x = document.images[i].x + document.images[i].width + 10;
			else
				x = self.pageXOffset + document.images[i].width + 10;
			document.layers[s].left = x+5;

			document.layers[s].visibility = "show";
		}
	}
	else {
		if(document.all)
			document.all[s].style.visibility = "hidden";
		else
			document.layers[s].visibility = 'hide';
	}
}