// 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--) { 
			intervallen[intervallen.length] = setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
			timer++; 
		} 
	} else if(opacStart < opacEnd) { 
		for(i = opacStart; i <= opacEnd; i++) 
			{ 
			intervallen[intervallen.length] = setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
			timer++; 
		} 
	} 
} 

//change the opacity for different browsers 
function changeOpac(opacity, id) { 
	var object 				= document.getElementById(id); 
	object.style.opacity 			= (opacity / 100); 
	object.style.MozOpacity 		= (opacity / 100); 
	object.style.KhtmlOpacity 		= (opacity / 100); 
	object.style.filter 			= "alpha(opacity=" + opacity + ")"; 
}