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Thread: javascript help with changing select box

  1. Apr 12th, 2002, 07:41 PM #1
    lleemon
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    javascript help with changing select box

    I have no clue about javascripting and hope someone can.
    I have a form with two select boxes as follows:
    <html>
    <body>
    <form name="TEST1">
    <p><select name="example1" size="1">
    <option value="Any" selected>Any</option>
    <option value="YES">Yes</option>
    <option value="NO">No</option>
    </select></p>
    <p><select name="example2" size="1">
    <option value="1" selected>choice1</option>
    <option value="2">choice2</option>
    <option value="3">choice3</option>
    <option value="4">choice4</option>
    </select></p>
    </form>
    </body>
    </html>

    Is it possible to have a javascript make a selection based on a selection of example1? If I change example1 to No I want example2 to move to choice4 and even make it so I can't change example2?

    Is this possible?

    Thanks.
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  2. Apr 12th, 2002, 08:52 PM #2
    Psyrus
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    <script>
    function makeChange(){

    if (frmMain.lstAnswer.options[1].selected)
    frmMain.lstResult.options[2].selected = true;
    }
    </script>

    <form NAME = "frmMain">
    <select NAME = "lstAnswer" ONCHANGE = "makeChange();">
    <option VALUE = "Any">Any</option>
    <option VALUE = "Yes">Yes</option>
    <option VALUE = "No">No</option>
    </select>
    <select NAME = "lstResult">
    <option VALUE = "First">First</option>
    <option VALUE = "Second">Second</option>
    <option VALUE = "Third">Third</option>
    </select>
    </form>
    Chris

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  3. Apr 13th, 2002, 07:56 AM #3
    lleemon
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    Psyrus - Thanks! That's just what I was looking for.

    One more question. Is it possible to disable or freeze a combobox? Just like below when a user selects a certain item in lstAnswer it defaults lstResult. Can I get lstResult to stay that certain answer or make it like the only answer possible?

    Thanks again.
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  4. Apr 13th, 2002, 10:02 AM #4
    Psyrus
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    <script>
    function makeChange(){

    if (frmMain.lstAnswer.options[1].selected){
    frmMain.lstResult.options[2].selected = true;
    frmMain.lstAnswer.disabled = true;
    }
    }
    </script>

    To disable it just add the code above to the script...
    Chris

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