function showtip (v) {
			if (document.all[v]) {
				var sw = document.body.clientWidth;
				var sh = document.body.clientHeight;
				var dw = document.all[v].clientWidth;
				var dh = document.all[v].clientHeight;
				var cx = self.event.clientX;
				var cy = self.event.clientY;
				if (sw < cx+dw+20) cx=sw-dw-20;
				if (sh < cy+dh+20) cy=sh-dh-20;
				document.all[v].style.top=cy+document.body.scrollTop+15;
				document.all[v].style.left=cx+document.body.scrollLeft+10;
				document.all[v].style.visibility='visible';
			}
		}
		function hidetip (v) {
			if (document.all[v]) {
				document.all[v].style.visibility='hidden';
			}
		}
		function tvirch (url) {
			w = screen.width*0.6; h = screen.height-100;
			t = (screen.height-h)/3; l = screen.width-w-32;
			wd = window.open (url, 'tvirch', 'location=no,scrollbars=yes,status=no,menubar=no,resizable=yes,top='+t+',left='+l+',width='+w+',height=100');
			wd.resizeTo(w+12,100);
			for (i=0; i<h-100; i+=10) wd.resizeBy(0,10);
			wd.focus();
			return false;
		}