function clickclear(thisfield, defaulttext) {
  if (thisfield.value == defaulttext) {
    thisfield.value = "";
  }
}
 
function clickrecall(thisfield, defaulttext) {
  if (thisfield.value == "") {
   thisfield.value = defaulttext;
  }
}

function clickvalidate() {
    var textbox = document.getElementById("textbox");

    if (textbox.value == "") {
        alert("You did not enter text in the textbox. Please enter before submitting form. \n");
        textbox.focus();
        return false;
    }
}