function ShowSection(num){
	if (num == "1"){
document.getElementById('level1').style.display = "block";
document.getElementById('level2').style.display = "none";
document.getElementById('level3').style.display = "none";
document.getElementById('link1').className = "sectionLinksSelected";
document.getElementById('link2').className = "sectionLinksnotSelected";
document.getElementById('link3').className = "sectionLinksnotSelected";

	}

else if (num == "2"){
document.getElementById('level1').style.display = "none";
document.getElementById('level2').style.display = "block";
document.getElementById('level3').style.display = "none";
document.getElementById('link1').className = "sectionLinksnotSelected";
document.getElementById('link2').className = "sectionLinksSelected";
document.getElementById('link3').className = "sectionLinksnotSelected";
	}
	
else if (num == "3"){
document.getElementById('level1').style.display = "none";
document.getElementById('level2').style.display = "none";
document.getElementById('level3').style.display = "block";
document.getElementById('link1').className = "sectionLinksnotSelected";
document.getElementById('link2').className = "sectionLinksnotSelected";
document.getElementById('link3').className = "sectionLinksSelected";
	}

else if (num == "4"){
document.getElementById('level1').style.display = "none";
document.getElementById('level2').style.display = "none";
document.getElementById('level3').style.display = "none";
document.getElementById('link1').className = "sectionLinksnotSelected";
document.getElementById('link2').className = "sectionLinksnotSelected";
document.getElementById('link3').className = "sectionLinksnotSelected";
	}
}


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 + ")"; 
}