function buscar(base)
{
	cat = document.getElementById('c');
	c = cat.value;
	
	if((c == -1) || (c == 0)) c = 'todas';
	text = new String(document.getElementById('q').value);	
	q = text.replace(' ', '+');
	if(q == 'Nombre') q = 'todos';
	location.href = base+'directorio/buscar/'+c+'/'+q;
}