function isNumberKey(evt){
  var charCode = (evt.which) ? evt.which : event.keyCode
  if (charCode > 31 && (charCode < 48 || charCode > 57))
		return false;
  return true;
}
function product_over(d_name) {
  document.getElementById(d_name + "_image").setAttribute("class", "product_foto_hover");
  document.getElementById(d_name + "_image").className = "product_foto_hover";
  document.getElementById(d_name + "_label").setAttribute("class", "product_label_hover");
  document.getElementById(d_name + "_label").className = "product_label_hover";
}
function product_out(d_name) {
  document.getElementById(d_name + "_image").setAttribute("class", "product_foto");
  document.getElementById(d_name + "_image").className = "product_foto";
  document.getElementById(d_name + "_label").setAttribute("class", "product_label");
  document.getElementById(d_name + "_label").className = "product_label";
}