function primo(div1,opacStart,opacEnd,millisec){	
  var speed = Math.round(millisec / 100);
	var timer = 0;
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + div1 + "')",(timer * speed));
            timer++;
        } 
}		
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 + ")";
}