var bJava = ( document.images );
if ( bJava )

{

classesOff = new Image();
classesOff.src = "images/homeart/navclasses.gif";

classesOn = new Image();
classesOn.src = "images/homeart/navclasses_on.gif";

lecturesOff = new Image();
lecturesOff.src = "images/homeart/navlectures.gif";

lecturesOn = new Image();
lecturesOn.src = "images/homeart/navlectures_on.gif";

publicationsOff = new Image();
publicationsOff.src = "images/homeart/navpublications.gif";

publicationsOn = new Image();
publicationsOn.src = "images/homeart/navpublications_on.gif";


aboutOff = new Image();
aboutOff.src = "images/homeart/navabout.gif";

aboutOn = new Image();
aboutOn.src = "images/homeart/navabout_on.gif";

reflectionsOff = new Image();
reflectionsOff.src = "images/homeart/navreflections.gif";

reflectionsOn = new Image();
reflectionsOn.src = "images/homeart/navreflections_on.gif";


}

function On( imgName) 
{
	if ( bJava )
	{
		img = eval( imgName + "On.src");
		document[imgName].src = img;  
	}
}
function Off( imgName) 
{
	if ( bJava )

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