/**
 * @author hhagedorn
 */
function randomImage()
{
    setHeight();
	var imageNumber = randomNumber();
		
	if (imageNumber > 0 && imageNumber < 4)
	{
		document.getElementById("randoms").innerHTML ="<img src='images/brandt-logo.JPG' border='0' />";
	}
	else
	{
		randomImage();
	}
	
}
function randomNumber()
{
	imageNumber = Math.round(Math.random() * 10);
	return imageNumber;
}
function setHeight()
{
	screenHeight = screen.availHeight - 387;
	
	document.getElementById("main_menu").style.height = screenHeight + "px";
		
    if ( document.getElementById("main_content").offsetHeight <= 994)
	{
		document.getElementById("main_content").style.height = screenHeight - 20+ "px";
	}
	else
	{
		document.getElementById("main_menu").style.height = document.getElementById("main_content").offsetHeight +"px";
	}
	
}