function opacity(id, opacStart, opacEnd, millisec) {
	//speed for each frame
	var speed = Math.round(millisec / 100);
	var timer = 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 changeOpac(opacity, id) {
	var docEl = document.getElementById(id).style;
	docEl.opacity = (opacity / 100);
	docEl.MozOpacity = (opacity / 100);
	docEl.KhtmlOpacity = (opacity / 100);
	docEl.filter = "alpha(opacity=" + opacity + ")";
}

function elementFadeIn(id,milisec)
{
	opacity(id,0,100,milisec);
}

function elementFadeOut(id,milisec)
{
	opacity(id,100,0,milisec);
}