function checkEmpty(formValue, formId){
  var errorId = formId + "Error";
  
  if ((formValue==null) || (formValue.length==0)){
    document.getElementById(errorId).style.visibility = "visible";
  }
  else{
    document.getElementById(errorId).style.visibility = "hidden";
  }
}

function checkSelection(selectRef, formId){
  var errorId = formId + "Error";
  
  var indexSelected = selectRef.selectedIndex;
  
  if(indexSelected > -1){
   document.getElementById(errorId).style.visibility = "hidden";
  }
  else{
   document.getElementById(errorId).style.visibility = "visible";
  }
}

/***********************************************
* Disable "Enter" key in Form script- By Nurul Fadilah(nurul@REMOVETHISvolmedia.com)
* This notice must stay intact for use
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/               
function handleEnter (field, event) {
  var keyCode = event.keyCode ? event.keyCode : event.which ? event.which : event.charCode;
  if (keyCode == 13) {
    var i;
    for (i = 0; i < field.form.elements.length; i++)
      if (field == field.form.elements[i])
        break;
    i = (i + 1) % field.form.elements.length;
    field.form.elements[i].focus();
    return false;
  } 
  else{
    return true;
  }
}