A lots of the time you want to add instructions to text box fields of the page to provide usability information to the users. Alternate way of doing this could be using default text in the input fields. A default text is the text which appears in the text box when it is empty. e.g.

You can see this is useful and good idea to have this in the UI. There is an easy trick in jQuery to do this. Below is the step by step procedure to do this.

Step1

<script src="jquery.js" type="text/javascript"></script>

Step 2

<style media="screen" type="text/css">
    .defaultText { width: 300px; }
    .defaultTextActive { color: #a1a1a1; font-style: italic; }
</style>

Step 3

<script language="javascript">
<!--
$(document).ready(function()
{
    $(".defaultText").focus(function(srcc)
    {
        if ($(this).val() == $(this)[0].title)
        {
            $(this).removeClass("defaultTextActive");
            $(this).val("");
        }
    });
    $(".defaultText").blur(function()
    {
        if ($(this).val() == "")
        {
            $(this).addClass("defaultTextActive");
            $(this).val($(this)[0].title);
        }
    });
    $(".defaultText").blur();        
});
//-->
</script>

Step 4

<input class="defaultText" title="e.g. someone@example.com" type="text" />

You default text setup is ready. Run the page and see the magic. Click here for a running sample page.