function changeOpacity(id, obj, objOpacity) {
	if(id) obj = document.getElementById(id);
	obj.style.opacity 		= (objOpacity/100);
	obj.style.MozOpacity 	= (objOpacity/100);
	obj.style.KhtmlOpacity	= (objOpacity/100);
	obj.style.filter		= "alpha(opacity="+objOpacity+")";
}

function moveBackgroundImage(id, obj, position) {
	if(id) obj = document.getElementById(id);
	obj.style.backgroundPosition = position+"px 0px";
}

function changeMoodImage(startFile, firstFile, lastFile) {
	container	= document.getElementById('moodContainer');
	minus		= document.getElementById('controlBoxMinus');
	start		= document.getElementById('controlBoxStart');
	plus		= document.getElementById('controlBoxPlus');
	startFile	= parseInt(startFile);
	firstFile	= parseInt(firstFile);
	lastFile	= parseInt(lastFile);
		
	container.style.backgroundImage = "url(/pix/backgrounds/home/"+startFile+".jpg)";
	bgImage		= container.style.backgroundImage;
	
	pointPosition = bgImage.indexOf(".");
	lastSlashPosition = bgImage.lastIndexOf("/");
	imageFile	= bgImage.substring(parseInt(lastSlashPosition)+1, pointPosition);
	imageFile = parseInt(imageFile);
	
	plus.onclick = function() {
		if(imageFile < lastFile) {
			imageFile = imageFile+1;
		} else {
			imageFile = firstFile;
		}
		/*if(!document.all) {
			for(i=0;i<=644;i++) {
				setTimeout("moveBackgroundImage('moodContainer', '', "+(i-644)+")", i*1);
				//setTimeout("changeOpacity('moodContainer', '', "+(i)+")", i*5);
			}
		}*/
		container.style.backgroundImage = "url(/pix/backgrounds/home/"+imageFile+".jpg)";
	}
	minus.onclick = function() {
		if(imageFile > firstFile) {
			imageFile = imageFile-1;
		} else {
			imageFile = lastFile;
		}
		
		container.style.backgroundImage = "url(/pix/backgrounds/home/"+imageFile+".jpg)";
	}
	start.onclick = function() {
		imageFile = firstFile;
		container.style.backgroundImage = "url(/pix/backgrounds/home/"+imageFile+".jpg)";
	}
	plus.onmouseover 	= function() {
		changeOpacity('',this, 70);
	}
	plus.onmouseout		= function() {
		changeOpacity('',this, 100);
	}
	minus.onmouseover 	= function() {
		changeOpacity('',this, 70);
	}
	minus.onmouseout		= function() {
		changeOpacity('',this, 100);
	}
	start.onmouseover 	= function() {
		changeOpacity('',this, 70);
	}
	start.onmouseout		= function() {
		changeOpacity('',this, 100);
	}
}