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  • Disallow First Dropdown Menu Choice
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  • Dropdown menus allow for directed input into your applications. Many times the first choice in the option list may be a title or define the options after it, so you really would not want that as input, nor would you want to correct for that on the server if you could help it. When the first option is selected an alert box will appear directing the user to select another option. The following example lists movie types. If the title option (Favorite Movie Type) is selected an alert box will appear directing the user to make another selection from the options available.
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    <html>
    <title>CodeAve.com(JavaScript: Disallow Dropdown First Choice)</title>
    <body bgcolor="#FFFFFF">

    <script Language="JavaScript">
    <!--
    function confirm_dropdown()
    {

    // Check to see if the dropdown value is is the first choice
    if (the_form.dropdown.selectedIndex == 0)
    {

    // If the first choice is selected display an alert box
    // stating the first choice is not a valid selection
    alert("Please select a movie type.");

    // Focus on the dropdown menu after OK is clicked from the alert box
    the_form.dropdown.focus();
    return (false);
    }
    // A choice other than the first was selected
    // cotinue processing the form request
    return (true);
    }
    //--></script>


    <form name="the_form" 
    method="get" 
    action="http://www.codeave.com/html/get.asp" 
    onsubmit="return confirm_dropdown()">

    <select size="1" name="dropdown">
    <option value="Favorite Movie Type">Favorite Movie Type</option>
    <option value="Drama">Drama</option>
    <option value="Comedy">Comedy</option>
    <option value="Action">Action</option>
    <option value="Romance">Romance</option>
    <option value="Documentary">Documentary</option>
    <option value="Sci-Fi">Sci-Fi</option>
    <option value="War">War</option>
    </select>
    <input type="submit" value="Submit">
    </form>

    </body>
    </html>

     

     

     



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