function hoverBackground(rowName,classStyleName) {
	document.getElementById(rowName).className=classStyleName+'-hover';
}
function normalBackground(rowName,classStyleName) {
	document.getElementById(rowName).className=classStyleName;
}

function hideSubmenu(submenu) {
	document.getElementById(submenu).style.display='none';
}
function submenu(submenu,rowName) {
	
	if((document.getElementById(submenu).style.display)=='none'){
		showSubmenu(submenu,rowName);
	}
	else {
		hideSubmenuRow(submenu);
	}

}
function showSubmenu(submenu,rowName) {
	document.getElementById(submenu).style.display='';
	document.getElementById(submenu+'_span').style.display='';
	
}

function hideSubmenuRow(submenu) {
	hideSubmenu(submenu);
	hideSubmenu(submenu+'_span');
}