var van=true;
function blink() {
	if(navigator.appName=="Netscape" || "Microsoft Internet Explorer" || "Opera") {
		if(van==true) {
		document.getElementById('blink').style.visibility="hidden";
		van=false;
		}
		else {
		document.getElementById('blink').style.visibility="visible";
		van=true;
		}
		setTimeout('blink()',1000);
	}
}

blink();