function menu_show( value ) {

	document.getElementById( value ).style.display = 'block';
	document.getElementById( value ).style.zIndex = '2000';
}

function menu_hide( value ) {

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

}

function menu_sub( curr ) {

	curr.onmouseover = function() {
	
		this.style.display = 'block';
		this.style.zIndex = '2000';
	
	}
	
	curr.onmouseout = function() {
	
		this.style.display = 'none';
	
	}

}