function Testeingabe(theForm)
{
I = 0;
String ='';

if (theForm.Name.value=='') 
  { theForm.Name.style.backgroundColor= '#ffff66';I = 1;}

if (theForm.Surname.value=='') 
  { theForm.Surname.style.backgroundColor= '#ffff66';I = 1;}

if (theForm.Email.value=='') 
  { theForm.Email.style.backgroundColor= '#ffff66';I = 1;}
  
//if (theForm.Phone.value=='') 
//  { theForm.Phone.style.backgroundColor= '#ffff66';I = 1;}
  
if (theForm.street1.value=='') 
  { theForm.street1.style.backgroundColor= '#ffff66';I = 1;}
  
if (theForm.street2.value=='') 
  { theForm.street2.style.backgroundColor= '#ffff66';I = 1;}
  
if (theForm.City.value=='') 
  { theForm.City.style.backgroundColor= '#ffff66';I = 1;}
  
if (theForm.Postcode.value=='') 
  { theForm.Postcode.style.backgroundColor= '#ffff66';I = 1;}
  
if (theForm.Country.value=='') 
  { theForm.Country.style.backgroundColor= '#ffff66';I = 1;}
  
if (theForm.Request.value=='') 
  { theForm.Request.style.backgroundColor= '#ffff66';I = 1;} 

if (I == 1)
{
 alert('Please fill in all yellow colored fields!'+String);  
    return (false);
  }

if (I == 0)
{
  return (true);
}
}