Type In A Drop Down Box

Dec 9, 2007

Is it possible using html or javascript, to allow users to type in a drop-down box if the option they're after doesn't exist in the list of options? I've defintely seen this before at least in a windows applications, and I'm pretty sure I've seen it online as well.

Does anyone know if this is at all possible? The only alternatives to this is to either have drop-down menu AND a textfield (wastes space), or have a little button which switches between the drop-down menu and a textfield. Both of those alternatives aren't ideal.

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Type More Than 1 Char Into A Drop Down List

Jan 10, 2005

I cannot remember the site nor the author, but it works BEAUTIFULLY!
I have changed the timeoutInterval to 500 milliseconds as I type with one finger - the original was 250 or even less.

<script language="JavaScript">
// script allows you to type more than one character into a drop-down list
//
//A typical drop-down need to have ONKEYPRESS and ONKEY functions added
//
//Example: <SELECT ID='vc_DESCRIPTION' NAME='vc_DESCRIPTION' onkeypress='listbox_onkeypress()' onblur='listbox_onblur()'>


var toFind = ""; // keyboard buffer
var timeoutID = ""; // process id for timer - when stopping the timeout
var timeoutInterval = 500; // milliseconds - keyboard buffer
var timeoutCtr = 0; // initialise of timer countdown
var timeoutCtrLimit = 3; // number of times timer is allowed to count down
var oControl = ""; // maintains a global reference to the user control

function listbox_onkeypress(){

window.clearInterval(timeoutID)
oControl = window.event.srcElement;
var keycode = window.event.keyCode;

if(keycode >= 32 ){
var c = String.fromCharCode(keycode);
c = c.toUpperCase();
toFind += c ;
find(); // search the listbox
timeoutID = window.setInterval("idle()", timeoutInterval); // restart the timer
}
}

function listbox_onblur(){ // function is called when user leaves listbox

window.clearInterval(timeoutID);
resetToFind();
}

function idle(){ // function is called if timeout expires - 3rd time stops timer and clear kb buffer

timeoutCtr += 1

if(timeoutCtr > timeoutCtrLimit){
resetToFind();
timeoutCtr = 0;
window.clearInterval(timeoutID);
}
}

function resetToFind(){

toFind = ""
}

function find(){

var allOptions = document.all.item(oControl.id);

for (i=0; i < allOptions.length; i++){
nextOptionText = allOptions(i).text.toUpperCase();

if(!isNaN(nextOptionText) && !isNaN(toFind) ){
nextOptionText *= 1;
toFind *= 1;
}

if(toFind == nextOptionText){
oControl.selectedIndex = i;
window.event.returnValue = false;
break;
}

if(i < allOptions.length-1){
lookAheadOptionText = allOptions(i+1).text.toUpperCase();

if( (toFind > nextOptionText) && (toFind < lookAheadOptionText) ){
oControl.selectedIndex = i+1;
window.event.cancelBubble = true;
window.event.returnValue = false;
break;
}
}
else{

if(toFind > nextOptionText){
oControl.selectedIndex = allOptions.length-1
window.event.cancelBubble = true;
window.event.returnValue = false;
break;
}
}
}
}
</script>

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If no id exists.
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And, based upon the complete set of return possibilities, what would be the best and most comprehensive tests I could apply to cover every base.

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how can a menu like the image attached

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Attachments
menu.jpg
Size : 29.72 KB
Download : 165

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// JavaScript Document
var posX;
var posY;
var element;

[Code]....

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HTML Code:
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[Code]...

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[Code]...

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I'm a newbie to Javascript, HTML, XHTML, CSS-- and oh god, everything, so please bear with me! I have come to understand that to get any better, I'll need support.

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Take a look at it here: [url]

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