var actualIndex=0;
var totalIndex=0;
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 + "'," + opacEnd +")",(timer * speed));
			timer++;
		}
	} else if(opacStart < opacEnd) {
		for(i = opacStart; i <= opacEnd; i++)
			{
			setTimeout("changeOpac(" + i + ",'" + id + "'," + opacEnd +")",(timer * speed));
			timer++;
		}
		}
}

//change the opacity for different browsers
function changeOpac(opacity, id, endOpa) {
	var object = document.getElementById(id).style;
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
	if (opacity==endOpa)
		startListOpacity(0);
}

function startListOpacity(tot)
{
if (tot>0)
	totalIndex=tot;
var name='col__'+actualIndex;
if (actualIndex<totalIndex)
	{opacity(name, 0, 100, 1500);
	actualIndex=actualIndex+1;}
}