Question

— Update –i have read a lot on the subject tried a few scripts and needed help to find out what you can or cant do. Community answered it all and the following is a good starting point. (answers here extracted from community below, thank you)

1. YOU CAN NOT OVERIDE DEFAULT STYLE OF ALERT. It is produced by your client (eg. chrome firefox etc)

2. you can use jquery instead. Instead of using a script like:

   function check_domain_input() {
   var domain_val = document.getElementsByName(‘domain’);
   if (domain_val[0].value.length > 0) {
   return true;
   }
   alert(‘Please enter a domain name to search for.’);
   return false;
   }

which makes the client (firefox chrome etc) produce an alert box.

2b. You tell the code if somethings needs to happen on a event load jquery alertbox which you can make pretty: (Answered by Jonathan Payne and created by Jonathan Payne. Thank you)

<link rel="stylesheet" href="http://code.jquery.com/ui/1.8.21/themes/base/jquery-ui.css" type="text/css" media="all" />

<div onclick="check_domain_input()">Click</div>

<div id="dialog" title="Attention!" style="display:none">
    Please enter a domain name to search for.
</div>

<script>
    function check_domain_input()
    {        
        $( "#dialog" ).dialog(); // Shows the new alert box.

        var domain_val = document.getElementsByName('domain');

        if (domain_val[0].value.length > 0)
        {
            return true;
        }

        $( "#dialog" ).dialog();

        return false;
    }
</script>

Check out the jsFiddle here: http://jsfiddle.net/8cypx/12/

Answer 1

Try jQuery UI located here: http://jqueryui.com/demos/dialog/

They have a theme roller where you can style the dialog and modal boxes.

— EDIT —

Answering your second question.

Check out the jsFiddle here: http://jsfiddle.net/8cypx/12/

<link rel="stylesheet" href="http://code.jquery.com/ui/1.8.21/themes/base/jquery-ui.css" type="text/css" media="all" />

<div onclick="check_domain_input()">Click</div>

<div id="dialog" title="Attention!" style="display:none">
    Please enter a domain name to search for.
</div>

<script>
    function check_domain_input()
    {        
        $( "#dialog" ).dialog(); // Shows the new alert box.

        var domain_val = document.getElementsByName('domain');

        if (domain_val[0].value.length > 0)
        {
            return true;
        }

        $( "#dialog" ).dialog();

        return false;
    }
</script>

​