/****************************
Change the opacity
****************************/
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++;
		}
	}
}

//change the opacity for different browsers
function changeOpac(opacity, id) {
	var idImgs = document.getElementById(id).getElementsByTagName("img");
	//var object = document.getElementById(id).style; 
	for(i=0; i<idImgs.length; i++){
	 var object = 	idImgs[i].style;
	 object.opacity = (opacity / 100);
	 object.MozOpacity = (opacity / 100);
	 object.KhtmlOpacity = (opacity / 100);
	 object.filter = "alpha(opacity=" + opacity + ")";
	}
}