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error_22 · #1 05-11-2006, 04:26 PM

Hi,

Im trying to make a form....but I think I need a javascript to get it the way i want it.

I have this html code:

HTML Code:

<select name="ltype">
<option selected>Choose type</option>
<option value="maindir">Main menu - direct link</option>
<option value="subdir">Sub menu - direct link</option>
</select>

If the first option is selected (Main menu - direct link) i want my next part of the form to show up. If the second option is selected i want another part of the form to show up. Is this possible with javascript? Where can i find information about this?

Thanks in advance!

Chroder · #2 05-13-2006, 05:21 PM

You need to use JS to toggle the 'display' CSS property of the form parts. When a page element has its display set to 'none', then it is removed from view. So you need to attach an 'onchange' event to the select box, and show/hide parts of the form depending on what is selected.

Here's an example:

Code:

<html>
<head>
    <title>Test</title>
    <script type="text/javascript">
        function showpartChanged(obj)
        {
            // Go through the options to hide/show
            // each section
            for(i = 0; i < obj.options.length; i++)
            {
                // Ge the value (ie: part1)
                val = obj.options[i].value;
                
                // Create the id of the form parts (ie: form_part1)
                form_part = 'form_' + val;

                // If its selected, then show the form part
                if(obj.options[i].selected)
                    document.getElementById(form_part).style.display = '';
                
                // It should be hidden
                else
                    document.getElementById(form_part).style.display = 'none';       
            }
        }
    </script>
</head>
<body>
    <select id="showpart" onchange="showpartChanged(this)">
        <option value="part1" selected="selected">Part 1</option>
        <option value="part2">Part 2</option>
        <option value="part3">Part 3</option>
    </select>
    
    <div id="form_part1">
        Form Part 1
    </div>
    
    <div id="form_part2" style="display:none;">
        Form Part 2
    </div>
    
    <div id="form_part3" style="display:none;">
        Form Part 3
    </div>
    
</body>
</html>

error_22 · #3 05-15-2006, 02:23 PM

By default, I dont want any of the options to show up, how can i achieve that?

Thank you so much for taking the time to help me!

Chroder · #4 05-15-2006, 02:24 PM

Just stick style="display:none" in the tag to hide it.

error_22 · #5 05-15-2006, 05:49 PM

great, thanks!

just one more thing....i want to add <option selected>something here</option>

but when i do that (and yes i have removed selected="selected" from form_part1) everything stops working. I mean, the parts wont show up.

Thanks in advance!

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