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 / 101);
	object.MozOpacity = (opacity / 101);
	object.KhtmlOpacity = (opacity / 101);
	object.filter = "alpha(opacity=" + opacity + ")";
}



function shiftOpacity(id, millisec) {
	//if an element is invisible, make it visible, else make it ivisible
	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;
	
	//set the current image as background
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	//make image transparent
	changeOpac(0, imageid);
	
	//make new image
	document.getElementById(imageid).src = imagefile;

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

function currentOpac(id, opacEnd, millisec) {
	//standard opacity is 100
	var currentOpac = 100;
	
	//if the element has an opacity set, get it
	if(document.getElementById(id).style.opacity < 100) {
		currentOpac = document.getElementById(id).style.opacity * 100;
	}

	//call for the function that changes the opacity
	opacity(id, currentOpac, opacEnd, millisec)
}
window.addEvent('domready',function() { 
 
	//scaling values
	var scale_px=6;
	var scale_em=0.3;
 
	var bumps=$$('.bump');
	bumps.each(function(bump, i){
		var init_size=bump.getStyle('font-size');
 
		var units=init_size.match(/em/)!=null ? 'em' : init_size.match(/px/)!=null ? 'px' : false;
		if(units===false) return false;
 
		var size_up=(init_size.toFloat()+(units=='em' ? scale_em : scale_px))+units;
		var fx=new Fx.Morph(bump, {duration:90, wait:false, transition:Fx.Transitions.Back.easeOut});
 
		bump.addEvent("mouseenter", function(event) {
			fx.start({
				'font-size':size_up
			});
		});
		bump.addEvent("mouseleave", function(event) {
			fx.start({
				'font-size':init_size
			});
		});
	});
});