var blink_speed=500;
var i=0;

function Blink(){
	if(i%2==0){
		document.getElementById("prem_hint").style.visibility="visible";
	}
	else {
		document.getElementById("prem_hint").style.visibility="hidden";
	} 
	if(i<1) {
		i++;
	} 
	else {
		i--;
	}
	setTimeout("Blink()",blink_speed);
}


function doBlink() {
	var blk = document.getElementById("prem_hint");
	if (blk) {
		setTimeout("Blink()",blink_speed);
	}
}
addLoadEvent(doBlink);