if (document.images){
	imgHomeOn = new Image();
	imgHomeOn.src = "images/topmenu/menu_homeG.gif" 
	imgIHMFActivitiesOn = new Image();
	imgIHMFActivitiesOn.src = "images/topmenu/menu_IHMFActivitesG.gif" 
	imgMonographsOn = new Image();
	imgMonographsOn.src = "images/topmenu/menu_monographsG.gif" 
	imgJournalOn = new Image();
	imgJournalOn.src = "images/topmenu/menu_HerpesJournalG.gif" 
	imgIHMFLearningOn = new Image();
	imgIHMFLearningOn.src = "images/topmenu/menu_IHMFLearningG.gif" 
	imgRegionalOn = new Image();
	imgRegionalOn.src = "images/topmenu/menu_RegionalG.gif" 
	imgPhysiciansOn = new Image();
	imgPhysiciansOn.src = "images/topmenu/menu_physiciansG.gif" 
	imgKeyWordOn = new Image();
	imgKeyWordOn.src = "images/topmenu/menu_keywordG.gif" 
	imgSponsorsOn = new Image();
	imgSponsorsOn.src = "images/topmenu/menu_sponsorsG.gif" 	


	imgHomeOff = new Image();
	imgHomeOff.src = "images/topmenu/menu_homeP.GIF" 
	imgIHMFActivitiesOff = new Image();
	imgIHMFActivitiesOff.src = "images/topmenu/menu_IHMFActivitesP.GIF" 
	imgMonographsOff = new Image();
	imgMonographsOff.src = "images/topmenu/menu_monographsP.GIF" 
	imgJournalOff = new Image();
	imgJournalOff.src = "images/topmenu/menu_HerpesJournalP.GIF" 
	imgIHMFLearningOff = new Image();
	imgIHMFLearningOff.src = "images/topmenu/menu_IHMFLearningP.GIF" 
	imgRegionalOff = new Image();
	imgRegionalOff.src = "images/topmenu/menu_regionalP.GIF" 
	imgPhysiciansOff = new Image();
	imgPhysiciansOff.src = "images/topmenu/menu_physiciansP.GIF" 
	imgKeyWordOff = new Image();
	imgKeyWordOff.src = "images/topmenu/menu_keywordP.GIF" 
	imgSponsorsOff = new Image();
	imgSponsorsOff.src = "images/topmenu/menu_sponsorsP.GIF" 	

}



function rollOn(ID){

	if(document.images){
		document[ID].src = eval("img" + ID + "On.src");

	}
}

function rollOff(ID){

	if(document.images){
		document[ID].src = eval("img" + ID + "Off.src");
	}
}