//sprawdzanie unikalnosci login 
function CheckUnique(column, value) {
document.getElementById(column).style.backgroundColor='#ffffff';
new Ajax.Request(ajaxCheckUnique,
  {
    method:'post',
    parameters: {column: column, value: value},
    onSuccess: function(transport){
      var response = transport.responseText;
      eval(response);
      
    },
    onFailure: function(){ alert('Something went wrong...') }
  });

}