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-   -   Conditional Pulldown Menu (https://vborg.vbsupport.ru/showthread.php?t=115272)

sketch42 05-11-2006 02:44 AM
Conditional Pulldown Menu
 
I have 3 pulldown menu's and i want it so that if i select say Option1 in Pulldown menu 1 than Option 3 in Pulldown menu 2 automatically gets selected. is this possible using standard html or do i need a javascript

Freesteyelz 05-14-2006 03:43 AM
Will this be a User CP or Admin CP select?

sketch42 05-14-2006 02:03 PM
its for a non vb page

Chroder 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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