function opacity(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++;

		}

	}

}



//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 + ")";

}