function validateFormOnSubmit(theForm) {
var reason = "";

  reason += validateEmpty(theForm.random);
  reason += validateEmpty(theForm.text);
      
  if (reason != "") {
    alert("You forgot something.\n");
    return false;
  }

}
function validateEmpty(fld) {
    var error = "";
 
    if (fld.value.length == 0) {
        fld.style.background = '#ffe185'; 
        error = "You forgot something.\n"
    } else {
        fld.style.background = ' ';
    }
    return error;  
}