function toggle_show(elementName) {
	document.getElementById(elementName).style.display = 'block';
}

function toggle_hide(elementName) {
	document.getElementById(elementName).style.display = 'none';
}

function toggle(elementName) {
	var theElement = document.getElementById(elementName);
	if(	theElement.style.display == 'none' ) {
		theElement.style.display = 'block';
		setCookie(elementName, 'block'); 
	} else {
		theElement.style.display='none';
		setCookie(elementName, 'none'); 
	}
}

function toggle_init(elementName) {
	var elementStyle = getCookie(elementName);
	if( elementStyle != null ) {
		// set element display style
		document.getElementById(elementName).style.display = elementStyle;
	}
}