function preloadImages ()
{
	var args = preloadImages.arguments;
	var imageArray = new Array(args.length);
	
	for (i = 0; i < args.length; i++)
	{
		imageArray[i] = new Image;
		imageArray[i].src = args[i];
	}
}


function setImages ()
{
	if ($('onderzoek'))
	{
		$('onderzoek').onmouseover = function ()
		{
			this.src = 'img/onderzoek_image_over.jpg';
		}
		
		if ($('onderzoek').className == "active")
		{
			$('onderzoek').onmouseout = function ()
			{
				this.src = 'img/onderzoek_image_over.jpg';
			}
		}
		else
		{
			$('onderzoek').onmouseout = function ()
			{
				this.src = 'img/onderzoek_image.jpg';
			}
		}
	
	//////////////
	
		$('fotografie').onmouseover = function ()
		{
			this.src = 'img/fotografie_image_over.jpg';
		}
		
		if ($('fotografie').className == "active")
		{
			$('fotografie').onmouseout = function ()
			{
				this.src = 'img/fotografie_image_over.jpg';
			}
		}
		else
		{
			$('fotografie').onmouseout = function ()
			{
				this.src = 'img/fotografie_image.jpg';
			}
		}
	
	//////////////
	
		$('onderwijs').onmouseover = function ()
		{
			this.src = 'img/onderwijs_image_over.jpg';
		}
		
		if ($('onderwijs').className == "active")
		{
			$('onderwijs').onmouseout = function ()
			{
				this.src = 'img/onderwijs_image_over.jpg';
			}
		}
		else
		{
			$('onderwijs').onmouseout = function ()
			{
				this.src = 'img/onderwijs_image.jpg';
			}
		}
	
	//////////////
	
		$('publicaties').onmouseover = function ()
		{
			this.src = 'img/publicaties_image_over.jpg';
		}
		
		if ($('publicaties').className == "active")
		{
			$('publicaties').onmouseout = function ()
			{
				this.src = 'img/publicaties_image_over.jpg';
			}
		}
		else
		{
			$('publicaties').onmouseout = function ()
			{
				this.src = 'img/publicaties_image.jpg';
			}
		}
	}
	else
	{
		$('research').onmouseover = function ()
		{
			this.src = 'img/research_image_over.jpg';
		}
		
		if ($('research').className == "active")
		{
			$('research').onmouseout = function ()
			{
				this.src = 'img/research_image_over.jpg';
			}
		}
		else
		{
			$('research').onmouseout = function ()
			{
				this.src = 'img/research_image.jpg';
			}
		}
	
	//////////////
	
		$('photography').onmouseover = function ()
		{
			this.src = 'img/photography_image_over.jpg';
		}
		
		if ($('photography').className == "active")
		{
			$('photography').onmouseout = function ()
			{
				this.src = 'img/photography_image_over.jpg';
			}
		}
		else
		{
			$('photography').onmouseout = function ()
			{
				this.src = 'img/photography_image.jpg';
			}
		}
	
	//////////////
	
		$('education').onmouseover = function ()
		{
			this.src = 'img/education_image_over.jpg';
		}
		
		if ($('education').className == "active")
		{
			$('education').onmouseout = function ()
			{
				this.src = 'img/education_image_over.jpg';
			}
		}
		else
		{
			$('education').onmouseout = function ()
			{
				this.src = 'img/education_image.jpg';
			}
		}
	
	//////////////
	
		$('publications').onmouseover = function ()
		{
			this.src = 'img/publications_image_over.jpg';
		}
		
		if ($('publications').className == "active")
		{
			$('publications').onmouseout = function ()
			{
				this.src = 'img/publications_image_over.jpg';
			}
		}
		else
		{
			$('publications').onmouseout = function ()
			{
				this.src = 'img/publications_image.jpg';
			}
		}
	}
}



function sendRequest (ajax_url)
{
	new Ajax.Request(ajax_url);
}




document.observe("dom:loaded", function ()
{
	preloadImages("img/onderzoek_image_over.jpg", "img/fotografie_image_over.jpg", "img/onderwijs_image_over.jpg", "img/publicaties_image_over.jpg", "img/research_image_over.jpg", "img/photography_image_over.jpg", "img/education_image_over.jpg", "img/publications_image_over.jpg");
	setImages();
});