var items = new Array();
function hideElementLater(id,n){
    clearTimeout(id);
	if(isNaN(n)){
		n=250;
	}
    items[id]=setTimeout("hideElement('"+id+"')",n);
}
function hideElement(id){
	setElementDisplay(id, "none");
}
function showElement(id){
	setElementDisplay(id, "block");
}

function setElementDisplay(id, disp){
    clearTimeout(id);
    var element = document.getElementById(id);
    if(element){
        element.style.display=disp;
    }
}

function clearTimeout(id){
    if(items[id]){
        window.clearInterval(items[id]);
    }
}