function hideBulletin(index){
	var doc = document.getElementById('bulletin_'+index);
	if( doc != null ){
		//alert('changing: ' + index);
		doc.style.display = 'none';
		doc.style.border = '0';
	}
}

function showBulletin(index){
	//alert(index);
	var ret = true;
	var i = 0;
	for( i = 0; i < 4; i++ ){
		hideBulletin(i);
	}
	var doc = document.getElementById('bulletin_'+index);
	if( doc != null ){
		doc.style.display = 'block';
	}
	ret = false
	return ret;
}

function startBulletin(){
	showBulletin(0);
}

function addLoadEvent(func) { 
	var oldonload = window.onload; 
	if(typeof window.onload != 'function'){
		window.onload = func;
	}else{
		window.onload = function(){
			if(oldonload){
				oldonload();
			}
			func();
		}
	}
}

addLoadEvent(startBulletin);