function changeBgPicture(vers, francis){
	  $('ipm').addClassName('cachetoi');
	  $('iphoto').addClassName('cachetoi');
	  $('ithai').addClassName('cachetoi');
	  $('icontact').addClassName('cachetoi');
	 	
	  $(vers).removeClassName('cachetoi');	 
	  if(francis == 0 ){
			$('francish').hide();
		}else{
			$('francish').show();
		}
}


Event.observe( window, 'load', function() 	
	{	
		$('pm').observe('mouseover', function() {	  changeBgPicture('ipm', 1)	; } 	);
		$('photographer').observe('mouseover', function() {	  changeBgPicture('iphoto', 0)	; } 	);
		$('boxer').observe('mouseover', function() {	  changeBgPicture('ithai', 1)	; } 	);
		$('contact').observe('mouseover', function() {	  changeBgPicture('icontact', 1)	; } 	);	
	}
);