function checkFormFields(){

if (document.forms[0].varUsername.value.length == 0){
   alert('Please enter a username.');
   document.forms[0].varUsername.focus();
   return false;
}

if (document.forms[0].varPassword.value.length == 0){
   alert('Please enter a password.');
   document.forms[0].varPassword.focus();
   return false;
}

return true
}

function checkFormFieldsTwo(){

if (document.forms[1].varUsername.value.length == 0){
   alert('Please enter a username.');
   document.forms[1].varUsername.focus();
   return false;
}

if (document.forms[1].varPassword.value.length == 0){
   alert('Please enter a password.');
   document.forms[1].varPassword.focus();
   return false;
}

return true
}