var opacityDiv = null;

function setOpacity (_opacity) {
	/*if (!opacityDiv) {
		opacityDiv = document.createElement("div");
		opacityDiv.style.display = "block";
		opacityDiv.style.position = "absolute";
		opacityDiv.style.left = 0;
		opacityDiv.style.top = 0;
		
		opacityDiv.style.width = "100%";
		opacityDiv.style.minWidth = "100%";
		opacityDiv.style.height = "100%";
		opacityDiv.style.minHeight = "100%";
		opacityDiv.style.backgroundColor = "#000000";
		opacityDiv.style.zIndex = -1;
		
		var bodyElement = document.getElementsByTagName("body").item(0);
		bodyElement.appendChild(opacityDiv);
	}*/
	
	opacityDiv = document.getElementById("opasity");
	if (_opacity == 0) {
		opacityDiv.style.display = "none";
	} else {
		opacityDiv.style.display = "block";
	}
	
	opacityDiv.style.opacity = _opacity / 100;
	opacityDiv.style.MozOpacity = _opacity / 100;
	opacityDiv.style.KhtmlOpacity = _opacity / 100;
	opacityDiv.style.filter = "alpha(opacity=" + _opacity + ")";
}