function showSubCats(c_id){
	if (document.getElementById('c_sub_categories_' + c_id).style.display == 'none') {
		document.getElementById('c_sub_categories_' + c_id).style.display = '';
	}
	else {
		document.getElementById('c_sub_categories_' + c_id).style.display = 'none';
	}
}