function transOpac(id, opacStart, opacEnd, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	if (opacStart > opacEnd) {
		for(i = opacStart; i >=opacEnd; i--) {
			setTimeout("changeOpac(" + i +",'" + id + "')",(timer*speed));
			timer++;
		}
	} else if (opacStart < opacEnd) {
		for(i = opacStart; i <=opacEnd; i++) {
			setTimeout("changeOpac(" + i +",'" + id + "')",(timer*speed));
			timer++;
		}
	}
}

function changeOpac(opacity, id) {
	var object = document.getElementById(id).style;
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function blendOpac(bkgrid, imgid, imgfile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	document.getElementById(bkgrid).style.backgroundImage = "url(" + document.getElementById(imgid).src + ")";
	changeOpac(0, imgid);
	document.getElementById(imgid).src = imgfile;
	for (i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imgid + "')",(timer*speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	var currentOpac = 100;
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100; }
	transOpac (id, currentOpac, opacEnd, millisec)
}