function show_scat(idcat)
{
	if(document.getElementById(idcat).className=='scateg_on')
	{
		document.getElementById(idcat).className='scateg_off';
		document.getElementById('main_'+idcat).className='on';
	}
	else
	{
		document.getElementById(idcat).className='scateg_on';
		document.getElementById('main_'+idcat).className='off';
	} 
}