function mouseOver() {
	if(checkElementId('filmpicture1'))
		changeOnEnter('filmpicture1');
			  
	else if(checkElementId('filmpicture2'))
		changeOnEnter('filmpicture2');	
}

function mouseOut() {
	if(checkElementId('filmpicture1'))											
		changeBack('filmpicture1');
		                
	else if(checkElementId('filmpicture2'))
		changeBack('filmpicture2');
}

//  Check of the id is gives to the ID that has been requested.
function checkElementId(id){
	var check = document.getElementById(id)
	if(check)
		return true;
	else
		return false;
}

// Change the image to the original. Gives back the new state.
function changeBack(id){
	document.getElementById(id).src="./wp-content/themes/alexion/images/slideshow/organisatie2.png";
}	

// Change the image to the 
function changeOnEnter(id){	
	document.getElementById(id).src="./wp-content/themes/alexion/images/slideshow/organisatie2_onmouseover.png";
}