function doBlink(){
	var blink = document.all.tags("blink");
	
	for (var i=0; i < blink.length; i++){
		blink[i].style.visibility = blink[i].style.visibility == "" ? "hidden" : "";
	}
} 

function startBlink() { 
	var speed = 1000; //±ôºýÀÌ´Â ¼Óµµ - 1000Àº 1ÃÊ
	setInterval("doBlink()",speed);
} 
//window.onload = startBlink;