function canviClass( capa, clase )
{
	var elem;
	if( document.getElementById )
		elem = document.getElementById( capa );
	else if( document.all )
		elem = document.all[capa];
	else if( document.layers )
		elem = document.layers[capa];
	elem.className = (elem.className==(clase+'no'))?(clase+'si'):(clase+'no');
}


function mostramig( imatge )
{
	var elem;
	if( document.getElementById )
		elem = document.getElementById( 'tamanymig' );
	else if( document.all )
		elem = document.all['tamanymig'];
		
	elem.src="/images/m/m_"+imatge+".jpg";
}