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Chroder · #4 05-15-2006, 01:17 AM

You'll need Javascript if you want it in realtime.

Use an onchange event on the menus that will change the others. Each select box has a selectedIndex property you can use to get the currently selected item, or set the selected item. For example:

Code:

var current = menu1.options[menu1.selectedIndex].value;

if(current == "some value")
    menu2.selectedIndex = 3;

More examples/info: http://www.javascriptkit.com/jsref/select.shtml

Here's a simple working demo:

HTML Code:

<html>
<head>
    <title>Test</title>
    <script type="text/javascript">
        /**
         * Set the selected option of a select
         * box to the first occurance of val.
         * @param The select box
         * @param The value to look for
         */
        function setSelectValue(sbox, val)
        {
            // Assume its an ID
            if(typeof sbox == 'string')
                sbox = document.getElementById(sbox);

            if(!sbox) return;
            
            // Set the correct value
            for(i = 0; i < sbox.options.length; i++)
            {
                if(sbox.options[i].value == val)
                    sbox.selectedIndex = i;
            }
        }
        
        
        /**
         * Get the value of the selected option.
         * @param The select box
         */
        function getSelectValue(sbox)
        {
            // Assume its an ID
            if(typeof sbox == 'string')
                sbox = document.getElementById(sbox);

            if(!sbox) return;
            
            return sbox.options[sbox.selectedIndex].value;
        }
        
        
        /**
         * Change menu2 selected item based on menu1
         */
        function menu1_onchange(sbox)
        {
            val = getSelectValue(sbox);
            
            if(val == "cool")
                setSelectValue("menu2", "high");
            else
                setSelectValue("menu2", "poor");
        }
    </script>
</head>
<body>
    
I am a
<select id="menu1" onchange="menu1_onchange(this)">
    <option value="cool">Cool</option>
    <option value="geek">Geeky</option>
</select>
person.

<br /><br />

I think of myself very
<select id="menu2">
    <option value="high">Highly</option>
    <option value="poor">Poorly</option>
</select>
.
    
</body>
</html>

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