function checkRequired(form){
	if (form.image.value==''){
			show('warning');
		return false;
		}
	return true;
}

function show(id){
	var o = document.getElementById(id);
	if (o)
		o.style.display = 'block';
}

function hide(id){
	var o = document.getElementById(id);
	if (o)
		o.style.display = 'none';
}

function NewCategory(){
	counter = 1;
	var x = document.getElementById("newcategory");
	var campo = document.createElement("input");
	campo.setAttribute('type', "text");
	campo.setAttribute('name', "newcategory"+counter);
	var br = document.createElement("br");
	x.appendChild(campo);
	x.appendChild(br);
	counter++;
}