var blink_interval=400;
var to_blink;
var to_blink_value;

function addEvent(obj,evType,fn,capt){ // ajoute un événement sans écraser l'éxistant.
	if(obj.addEventListener){
		obj.addEventListener(evType,fn,capt);
		return true;
	} 	//firefox&autres
	else if(obj.attachEvent)	//ie
		obj.attachEvent("on"+evType,fn) 
	else {
		return false;
	}
} 
addEvent(window,"load",init_blink);

function init_blink() {
	to_blink=get_blink();
	to_blink_value=to_blink.firstChild.nodeValue;
	setInterval("blink()",blink_interval);
}	

function blink() {
	if(to_blink.firstChild.nodeValue==to_blink_value)
		to_blink.firstChild.nodeValue=String.fromCharCode(160);
	else
		to_blink.firstChild.nodeValue=to_blink_value;
}

function get_blink() {
	var strong_elements=document.getElementsByTagName("strong");
	for (var i=0;i<strong_elements.length;++i) {
		if(strong_elements[i].className == "blink")
			return strong_elements[i];
	}
}