function $() {
	var elements = new Array();
	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);
		if (arguments.length == 1)
			return element;
		elements.push(element);
	}
	return elements;
}

function showSubNav(block){
var divBlock = document.getElementById(block);
//$('subnav')
divBlock.style.display = 'block';
$('#'+ block).css('z-index','1000');

}

function hideSubNav(block){

document.getElementById(block).style.display = 'none';

}