var myTimer = 4000;
var myStop = "1";

function ShowSection(num, num2, num3, num4, num5, opc){
	if (num == "1"){
opacity('crime_sceneScreen', 0, 0, 0);
document.getElementById('w1').style.visibility = "visible";
opacity('crime_sceneScreen', 0, 100, 1000);
document.getElementById('w2').style.visibility = "hidden";
document.getElementById('w3').style.visibility = "hidden";
document.getElementById('w4').style.visibility = "hidden";
document.getElementById('w5').style.visibility = "hidden";
if (myStop=="1"){ setTimeout('tempStop(2)',myTimer); } 
}

else if (num == "2"){
opacity('latent_aceScreen', 0, 0, 0);
document.getElementById('w1').style.visibility = "hidden";
document.getElementById('w2').style.visibility = "visible";
opacity('latent_aceScreen', 0, 100, 1000);
document.getElementById('w3').style.visibility = "hidden";
document.getElementById('w4').style.visibility = "hidden";
document.getElementById('w5').style.visibility = "hidden";
if (myStop=="1") {setTimeout('tempStop(3)',myTimer);}
	}
	
else if (num == "3"){
opacity('bag_tagScreen', 0, 0, 0);
document.getElementById('w1').style.visibility = "hidden";
document.getElementById('w2').style.visibility = "hidden";
document.getElementById('w3').style.visibility = "visible";
opacity('bag_tagScreen', 0, 100, 1000);
document.getElementById('w4').style.visibility = "hidden";
document.getElementById('w5').style.visibility = "hidden";
if (myStop=="1") {setTimeout('tempStop(4)',myTimer);}
}

else if (num == "4"){
opacity('video_interviewScreen', 0, 0, 0);
document.getElementById('w1').style.visibility = "hidden";
document.getElementById('w2').style.visibility = "hidden";
document.getElementById('w3').style.visibility = "hidden";
document.getElementById('w4').style.visibility = "visible";
opacity('video_interviewScreen', 0, 100, 1000);
document.getElementById('w5').style.visibility = "hidden";
if (myStop=="1") {setTimeout('tempStop(5)',myTimer);}
}

else if (num == "5"){
opacity('property_evidenceScreen', 0, 0, 0);
document.getElementById('w1').style.visibility = "hidden";
document.getElementById('w2').style.visibility = "hidden";
document.getElementById('w3').style.visibility = "hidden";
document.getElementById('w4').style.visibility = "hidden";
document.getElementById('w5').style.visibility = "visible";
opacity('property_evidenceScreen', 0, 100, 1000);
if (myStop=="1") {setTimeout('tempStop(1)',myTimer);}
	}
}

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 stopThis(){
    window.myStop = 2;
    return;
}

function tempStop(num){
	if (myStop=="1") {ShowSection(num);} else { return; }
}