function picOn(imName) {
		if (document.images) { 
		document.images[imName].src = 'images/hp_sm_' + imName + "a.jpg"
			 };
}
function picOff(imName) {
		if (document.images) { 
		document.images[imName].src = 'images/hp_sm_' + imName + '.jpg' 
		};
}