pic1 = new Image(16, 16); 
pic1.src = "loader.gif";
$("#nick_name").change(function(){var usr=$("#nick_name").val();if(usr.length>=4){$("#status").html('<img src="images/loader.gif" align="middle" alt="" title=""/>');$.ajax({type:"POST",url:"check_username.php",data:"nick_name="+usr,success:function(msg){$("#status").ajaxComplete(function(event,request,settings){if(msg=="OK"){$("#nick_name").removeClass("object_error");$("#nick_name").addClass("object_ok");$(this).html('&nbsp;<img src="images/tick.gif" align="middle" alt="" title="" />')}else{$("#nick_name").removeClass("object_ok");$("#nick_name").addClass("object_error");$(this).html(msg)}})}})}else{$("#status").html('<font color="red" /><?php echo $reg_nick_min; ?>');$("#nick_name").removeClass("object_ok");$("#nick_name").addClass("object_error")}});