Someone

function validateField(objForm, fields, i)
{	
	var ajax = new Ajax.Request(
        '/order/validation/validate_field.php',
        {
          method:'post',
          parameters: objForm.serialize(objForm),
          onComplete: 
          	function (oReq)
          	{          		
          		if(oReq.responseText != "1")
          		{
          			$('error_'+fields[i]).innerHTML = '<font color="red"><b>(!)</b></font>';
          			
          			if(fields[i] == "confirm_email") 
          			{ 
          			}
          			else
          			{
          				$('stringErrorList').innerHTML = $('stringErrorList').innerHTML + '<li>' + oReq.responseText + '</li>';
          			}
          			
          			$('errorlist').style.display = 'block';
					objForm.has_errors.value = 1;
					return false;
          		}
          		else
          		{
          			$('error_'+fields[i]).innerHTML = '';
          			return true;
          		}
           	}
        }
    );
}