function opacity(id, opacStart, opacEnd, millisec) {

	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 0;
	var ido = 0;

	//determine the direction for the blending, if start and end are the same nothing happens
	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 bopacity (id, opacStart, opacEnd, millisec){
setTimeout("opacity('" + id + "'," + opacStart + "," + opacEnd + "," + 300 + ")",0);
setTimeout("opacity('" + id + "'," + opacEnd + "," + opacStart + "," + 400 + ")",300);}

//change the opacity for different browsers
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 + ")";
}