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++;
		}
	}
}

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 + ")";
}

function shiftOpacity(id, millisec) {

	if(document.getElementById(id).style.opacity == 0) {
		opacity(id, 0, 100, millisec);
	} else {
		opacity(id, 100, 0, millisec);
	}
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	

	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	

	changeOpac(0, imageid);
	

	document.getElementById(imageid).src = imagefile;


	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function currentOpac(id, opacEnd, millisec) {
	var currentOpac = 100;
	

	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	opacity(id, currentOpac, opacEnd, millisec)
}

function am_show_box () {
	delay=500;
	fade=document.getElementById('am_fade');
	light=document.getElementById('am_light');

	fade.style.display='block';
	opacity('am_fade', 0, 80, delay);
	setTimeout("light.style.display='block'",delay);
}
function am_hide_box () {
	delay=500;
	fade=document.getElementById('am_fade');
	light=document.getElementById('am_light');

	light.style.display='none';
	opacity('am_fade', 80, 0, delay);
	setTimeout("fade.style.display='none'",delay);
}