var preloadFlag = false;
function preloadImages() {
if (document.images)  {
	// load images
	

	primarydramaoff=new Image();
	primarydramaoff.src = '../../bnb/butoe1.gif';			
	primarydramaon=new Image();
	primarydramaon.src = '../../bnb/butne1.gif';
	
	secondaryoff=new Image();
	secondaryoff.src = '../../bnb/butoe2.gif';			
	secondaryon=new Image();
	secondaryon.src = '../../bnb/butne2.gif';
	
	feandheoff=new Image();
	feandheoff.src = '../../bnb/butoe3.gif';			
	feandheon=new Image();
	feandheon.src = '../../bnb/butne3.gif';
	
	teachertrainingoff=new Image();
	teachertrainingoff.src = '../../bnb/butoe4.gif';			
	teachertrainingon=new Image();
	teachertrainingon.src = '../../bnb/butne4.gif';
	
	pupilwkshopsoff=new Image();
	pupilwkshopsoff.src = '../../bnb/butoe5.gif';			
	pupilwkshopson=new Image();
	pupilwkshopson.src = '../../bnb/butne5.gif';

	preloadFlag = true;
	window.focus();
		}
}


// function that does MouseOvers and MouseOut calls


function buttonChange(imName,imSource) {
		if (document.images && (preloadFlag == true)) {
		document[imName].src=eval(imSource + ".src");
	}
}