function updateBackground(obj,color){obj.style.backgroundColor=color;}
function loginGuest()
 {
 getObject('TXTlogin').value='guest';
 getObject('PWDpassword').value='guest';
 }
function getObject(obj)
 {
 var rObj;
 if(typeof obj=='string')
  {
  if(document.getElementById)rObj=document.getElementById(obj);
  else if(document.all)rObj=document.all[obj];
  }
 else if(obj.style)rObj=obj;
 return rObj;
 }
function checkLoginForm(thisForm)
 {
 var empty='';
 var missing='';
 if(thisForm.PWDpassword.value=='')
  {
  empty=thisForm.PWDpassword;
  missing='\nPassword is required.'+missing;
  }
 if(thisForm.TXTlogin.value=='')
  {
  empty=thisForm.TXTlogin;
  missing='\nUsername is required.'+missing;
  }
 if(empty=='')return true;
 else
  {
  alert('Please check your inputs.\n'+missing);
  empty.focus();
  return false;
  }
 }