// JavaScript Document

function ChangeIMG( menu_el, img_name )
{
	menu_el.src = img_name;
}

function setErrorMessage(innerText) {
	errorMessage = innerText;
}

function getElement( element_id )
{
	if( document.getElementById( element_id ) )
	{
		return document.getElementById( element_id );
	}
	else return null;
}