var headOpacity=10;
var fadeInterval;
function fadeHead() {
	if((headOpacity-=0.5)>=0)setOpacity(document.getElementById("movieimg"), headOpacity);
	else clearInterval(fadeInterval);
}
function setOpacity(obj, value) {
	obj.style.opacity = value/10;
	obj.style.filter = 'alpha(opacity=' + value*10 + ')';
}