function StoreCheckoutValidate(){
	var error = 0;
	if(!RequiredField("name")) error++;
	if(!RequiredField("nif")) error++;
	if(!RequiredField("address")) error++;
	if(!RequiredField("city")) error++;
	if(!RequiredField("postal")) error++;
	if(!RequiredField("phone")) error++;
	if(!RequiredField("email")) error++;
	if(!IsNumeric("phone")) error++;
	if(!IsNumeric("postal")) error++;
	
	if(error > 0)
		return false;
	else
		return true;
}

function RequiredField(object)
{
	var error = true;
	var val_object = "val_" + object;
	var string = document.getElementById(object).value;
	if(string == ""){
		document.getElementById(val_object).style.display = ""; 
		error = false;
	}else{
		document.getElementById(val_object).style.display = "none"; 
	}
	return error;
}

function IsNumeric(object)
{
	var error = true;
	var val_object = "val_" + object;
	var string = document.getElementById(object).value;
	var iChars = "0123456789";
	for(var i = 0; i < string.length; i++) {
		if(iChars.indexOf(string.charAt(i)) == -1){
			document.getElementById(val_object).style.display = ""; 
			error = false;
		}else{
			document.getElementById(val_object).style.display = "none";
		}
	}
	return error;
}