var pos = 250;
var size = 0;
var overImage = false;
function BannerDisplayOver() {
	overImage = true;
	return false;
}

function BannerDisplayOut() {
	overImage = false;
	return false;
}		
	
function mover() {
	if (!overImage) {
		if (window.document.getElementById) {
			document.getElementById("tiraImg").style.width = "" + window["sizetira"] +"px";
			size = window["sizetira"];
			if(Math.abs(pos) < size){
				document.getElementById("tiraImg").style.left = pos +"px";
				pos = pos - 4;
			} else {
				document.getElementById("tiraImg").style.left = 250 +"px";
				pos = parseInt("250");
			}
		}
	}
	setTimeout("mover()",60);
}