function mtOverHiddenItem(comp){comp.className='over_button';} 
function mtOutOfHiddenItem(comp){comp.className='inactive_button';}
function mtOverHiddenItem2(comp){comp.className='over_button2';} 
function mtOutOfHiddenItem2(comp){comp.className='inactive_button2';}
function mtGoTo(url){window.location=url;}