function rolloverlogo(img_name) {
	if (document.images) {
		eval('document.'+img_name+'.src="imgs/'+img_name+'-hot.gif"');
	}	
}

function rolloutlogo(img_name) {
	if (document.images) {
		eval('document.'+img_name+'.src="imgs/'+img_name+'-cold.gif"');
	}
}

function rollover(img_name) {
	if (document.images) {
		eval('document.'+img_name+'.src="imgs/nav/'+img_name+'-hot.gif"');
	}	
}

function rollout(img_name) {
	if (document.images) {
		eval('document.'+img_name+'.src="imgs/nav/'+img_name+'-cold.gif"');
	}
}