Solved

How to get all the not selected value of multiple list box

Posted on 2010-09-20
10
462 Views
Last Modified: 2012-05-10
Hi experts,
How to get all the not selected values of multiple list box.  For selected : elSel.options[k].selected

So, what the javascript for not selected values.
0
Comment
Question by:sitijaafar
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
  • 2
  • +1
10 Comments
 
LVL 40

Accepted Solution

by:
gurvinder372 earned 500 total points
ID: 33722851
using javsacript, you can get all the values in select box which are unselected in a hidden field.
Then you can send those values (comma separated) to servlet after submitting them

try this code
<html>
<head>
<script type="text/javascript">
function unselectedOptions()
{
  var options = document.getElementById("mySelect").options;   
  var unSelectedVals = new Array();
  for ( var counter =0; counter < options.length; counter++ )
  {
     if ( !options[ counter ].checked )
     {
         unSelectedVals[ unSelectedVals.length ] = options[ counter ].value;
     }
  }
  alert(unSelectedVals.join(","));
}
</script>
</head>
<body>

<form>
<select id="mySelect" size="4" multiple>
	<option>Apple</option>
	<option>Pear</option>
	<option>Banana</option>
	<option>Orange</option>
</select>
<a href="javascript:unselectedOptions()">Show all Unselected options</a>
</form>
</body>
</html>

Open in new window

0
 
LVL 14

Expert Comment

by:Dushyant Sharma
ID: 33722915
elSel.options[k].selected itself returns boolean.
so checking it for false will return all the not selected values.

you can check as
if (elSel.options[k].selected==false)
0
 

Author Comment

by:sitijaafar
ID: 33722924
I try your code, it display all the values even the selected one.
0
Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

 

Author Comment

by:sitijaafar
ID: 33722931
so, here my code.
function removeCountrySelected()
{
  var elSel = document.getElementById("learnCountry1");
  var i; 
  var alrmsg;
  var country;
  var countries;
  i
  for (i = elSel.length - 1; i>=0; i--) {
    if (elSel.options[i].selected) {	  
      elSel.remove(i);
    }	
	
	 if (elSel.options[i].selected==false) {	  
        country=elSel.options[i].value;
		countries+=country;
    }	
	document.frm.learnCountry.value=countries;

  
}

Open in new window

0
 
LVL 14

Expert Comment

by:Dushyant Sharma
ID: 33722937
try this
<script type="text/javascript">

var myselect=document.getElementById("sample")
for (var i=0; i<myselect.options.length; i++){
 if (myselect.options[i].selected==false){

  alert(i + "is not selected");
 }
}
</script>
0
 
LVL 40

Expert Comment

by:gurvinder372
ID: 33722938
Sorry, i need to use the 'selected' method, not the 'checked'

replace that method with
function unselectedOptions()
{
  var options = document.getElementById("mySelect").options;  
  var unSelectedVals = new Array();
  for ( var counter =0; counter < options.length; counter++ )
  {
     if ( !options[ counter ].selected )
     {
         unSelectedVals[ unSelectedVals.length ] = options[ counter ].value;
     }
  }
  alert(unSelectedVals.join(","));
}
0
 

Author Comment

by:sitijaafar
ID: 33723006
yes, it work, I try to apply to my code.
0
 

Author Comment

by:sitijaafar
ID: 33723028
I apply the code but not succeed.  
function removeCountrySelected()
{
  var elSel = document.getElementById("learnCountry1");
  var i; 
  var alrmsg;
  var country;
  var countries;
  var unSelectedVals = new Array();
  for (i = elSel.length - 1; i>=0; i--) {
    if (elSel.options[i].selected) {	  
      elSel.remove(i);
    }	
	
	if ( !elSel.options[i].selected )
     {
         unSelectedVals[ unSelectedVals.length ] = elSel.options[i].value;
     }	
	
  
}
document.frm.learnCountry.value=unSelectedVals.join(",");


}

Open in new window

0
 
LVL 75

Expert Comment

by:Michel Plungjan
ID: 33723203
This should work

function removeCountrySelected() {
  var elSel = document.getElementById("learnCountry1");
  var unSelectedVals = [];
  for (var i = elSel.length - 1; i>=0; i--) {
    if (elSel.options[i].selected) elSel.options[i].remove();
    else unSelectedVals[unSelectedVals.length] = elSel.options[i].value;
  }
  document.frm.learnCountry.value=(unSelectedVals.length >0)unSelectedVals.join(","):"";
}

Open in new window

0
 
LVL 40

Expert Comment

by:gurvinder372
ID: 33723244
@sitijaafar: line 14-17 was not required, since once you have removed it from select box, it wont be accessible again,

Also remove line 21 now, since learnCountry select box now has only unselected value

0

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article discusses how to create an extensible mechanism for linked drop downs.
Boost your ability to deliver ambitious and competitive web apps by choosing the right JavaScript framework to best suit your project’s needs.
In this tutorial viewers will learn how to position overlapping items using z-index in CSS. They will also learn the restrictions on the z-index property.  Create a new HTML document with an internal stylesheet.: Create a div in CSS and name it Red.…
The viewer will the learn the benefit of plain text editors and code an HTML5 based template for use in further tutorials.
Suggested Courses

617 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question