function xs_show(tooltipId, parentId)
{

   it = document.getElementById(tooltipId);
    
    if ((it.style.top == '' || it.style.top == 0) 
        && (it.style.left == '' || it.style.left == 0))
    {
        // need to fixate default size (MSIE problem)
        it.style.width = it.offsetWidth + 'px';
        it.style.height = it.offsetHeight + 'px';
        
        img = document.getElementById(parentId); 
       
    }
	
    it.style.visibility = 'visible'; 

}

function xs_hide(id)
{
    it = document.getElementById(id); 
    it.style.visibility = 'hidden'; 
}