var submittedAlready = false;

function disableForm(theform) {
	if (submittedAlready == true) { theform.disabled=true; return false; }
	if (document.all || document.getElementById) {
		for (i = 0; i < theform.length; i++) {
			var tempobj = theform.elements[i];
			if (tempobj.type.toLowerCase() == "submit" || tempobj.type.toLowerCase() == "reset") {
				tempobj.disabled = true;
			}
			if (tempobj.type.toLowerCase() == "image" && submittedAlready == false) {
				submittedAlready = true;
				return true;
			}
		}
		return true;
	} else {
		return false;
  }
}