function hideMenus(){
	document.getElementById('drop_patients').style.display='none';
	document.getElementById('drop_community').style.display='none';
	document.getElementById('drop_providers').style.display='none';
	document.getElementById('drop_career').style.display='none';
	document.getElementById('drop_volunteer').style.display='none';
	document.getElementById('drop_donations').style.display='none';
}
function showMenu($var, $image){
	hideMenus();
	document.getElementById($var).style.display = 'block';
	//alert("/assets/images/navigation/btn_"+$var.substr(5)+"_over.gif");
	//document.getElementById($image).src = "/assets/images/navigation/btn_"&$var.substr(5)&"_over.gif";
}