//initialise page

function init() {
if (document.getElementById("BodyDivContent")) {
	document.getElementById("BodyDivContent").style.display = "block";
}
}
window.onload = init; 

// simple preload function
function preload(sPath) {
	var o = new Image();
	o.src = sPath;
	return o;
}


// handle rollovers
function mOver(Image) {
	if(Image) {
		if(Image.src.indexOf("_o") == -1) {
   			Image.src = Image.src.replace(".jpg", "_o.jpg");
	    }
	 }
	 
	 if(lastImage) {
		lastImage.src = lastImage.src.replace("_o.jpg", ".jpg");
		}	
	lastImage = Image;
}

function mOverGif(Image) {
	if(Image) {
		if(Image.src.indexOf("_o") == -1) {
   			Image.src = Image.src.replace(".gif", "_o.gif");
	    }
	 }
	 
	 if(lastImage) {
		lastImage.src = lastImage.src.replace("_o.gif", ".gif");
		}	
	lastImage = Image;
}

var lastImage;

function getWindowHeight() 
{
	var windowHeight=0;
	if (typeof(window.innerHeight)=='number') 
	{
		windowHeight=window.innerHeight;
	}
	else 
	{
		if (document.documentElement&& document.documentElement.clientHeight) 
		{
			windowHeight = document.documentElement.clientHeight;
		}
		else 
		{
			if (document.body&&document.body.clientHeight) 
			{
				windowHeight = document.body.clientHeight;
			}
		}
	}
	
	return windowHeight;
}

// determine height for <div> element 
function getDivSize(DivID) {	
	d= document.getElementById(DivID)
	var divHeight = 0
	
	if(d.offsetHeight)
		{ 
		 divHeight=d.offsetHeight; 
		} 
		else if(d.style.pixelHeight)
		{ 
		 divHeight=d.style.pixelHeight; 
		} 

	return divHeight;	
}


//Write random image for homepage
function randomBG() {
var randnum;
randnum = Math.floor(Math.random() * 3);
if (randnum == 1) {
document.getElementById("homeImg1").src="../Images/HomeBody01b.jpg";
document.getElementById("DivHomeBodyText").style.backgroundImage="url(../Images/HomeBody02b.jpg)";
document.getElementById("homeImg2").src="../Images/HomeBody03b.jpg";
} else if (randnum == 2){
document.getElementById("homeImg1").src="../Images/HomeBody01c.jpg";
document.getElementById("DivHomeBodyText").style.backgroundImage="url(../Images/HomeBody02c.gif)";
document.getElementById("homeImg2").src="../Images/HomeBody03c.jpg";
} 

}