is_ie = ((/msie/i.test(window.navigator.userAgent) && !/opera/i.test(window.navigator.userAgent)));
function GID(id)
{ 
	 return (is_ie) ? document.all[id] : document.getElementById(id);
}

function showHideEl(id,act) 
{
	if(act == 'hide')
	{
		GID(id).style.visibility = 'hidden';
	} else if(act == 'show')
	{
		GID(id).style.visibility = 'visible';
	}
}