﻿function fadeOut(elem) {
	if (elem.id) {
		fadeElementSetup(elem.id, 100, 0, 10);
	}
}

function fadeIn(elem) {
	if (elem.id) {
		fadeElementSetup(elem.id, 0, 100, 10);	
	}
}

var fadeActive = new Array();
var fadeQueue  = new Array();
var fadeTimer  = new Array();
var fadeClose  = new Array();
var fadeMode   = new Array();

function fadeElementSetup(theID, fdStart, fdEnd, fdSteps, fdClose, fdMode) {

	if (fadeActive[theID] == true) {
		fadeQueue[theID] = new Array(theID, fdStart, fdEnd, fdSteps);
	} else {
		fadeSteps = fdSteps;
		fadeCurrent = 0;
		fadeAmount = (fdStart - fdEnd) / fadeSteps;
		fadeTimer[theID] = setInterval("fadeElement('"+theID+"', '"+fadeCurrent+"', '"+fadeAmount+"', '"+fadeSteps+"')", 15);
		fadeActive[theID] = true;
		fadeMode[theID] = fdMode;
		
		if (fdClose == 1) {
			fadeClose[theID] = true;
		} else {
			fadeClose[theID] = false;
		}
	}
}

function fadeElement(theID, fadeCurrent, fadeAmount, fadeSteps) {

	if (fadeCurrent == fadeSteps) {

		clearInterval(fadeTimer[theID]);
		fadeActive[theID] = false;
		fadeTimer[theID] = false;


		if (fadeClose[theID] == true) {
			document.getElementById(theID).style.visibility = "hidden";
		}

		if (fadeQueue[theID] && fadeQueue[theID] != false) {
			fadeElementSetup(fadeQueue[theID][0], fadeQueue[theID][1], fadeQueue[theID][2], fadeQueue[theID][3]);
			fadeQueue[theID] = false;
		}
	} else {

		fadeCurrent++;
				
		if (fadeMode[theID] == "shadow") {
		
			if (fadeAmount < 0) {
				document.getElementById(theID).style.webkitBoxShadow = shadowSettings + (Math.abs(fadeCurrent * fadeAmount)) + ')';
			} else {
				document.getElementById(theID).style.webkitBoxShadow = shadowSettings + (100 - (fadeCurrent * fadeAmount)) + ')';
			}
			
		} else {
					
			if (fadeAmount < 0) {
				setOpacity(Math.abs(fadeCurrent * fadeAmount), theID);
			} else {
				setOpacity(100 - (fadeCurrent * fadeAmount), theID);
			}
		}

		clearInterval(fadeTimer[theID]);
		fadeTimer[theID] = setInterval("fadeElement('"+theID+"', '"+fadeCurrent+"', '"+fadeAmount+"', '"+fadeSteps+"')", 15);
	}
}

function setOpacity(opacity, theID) {

	var object = document.getElementById(theID).style;


	if (navigator.userAgent.indexOf("Firefox") != -1) {
		if (opacity == 100) { opacity = 99.9999; } 
	}


	object.filter = "alpha(opacity=" + opacity + ")"; 
	object.opacity = (opacity / 100);                 

}

