// JavaScript Document

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 object = document.getElementById(id).style;

    object.opacity = (opacity / 100);

    object.MozOpacity = (opacity / 100);

    object.KhtmlOpacity = (opacity / 100);

    object.filter = "alpha(opacity=" + opacity + ")";

}