function checkForm()
{
 var valid = true;
 if(document.getElementById('contact_name').value == '')
  valid = false;
 if(document.getElementById('contact_phone').value == '')
   valid = false;
 if(document.getElementById('contact_email').value == '')
   valid = false;
 if(document.getElementById('contact_content').value == '')
   valid = false;
 
 if(valid)
  return true;
 else
  return false;
 //if(valid)
 // document.getElementById('contact_form').submit();  
 //else
 // window.alert("Prosze wypełnić wszystki pola formularza") 
 

}