post back occurs javascript listbox items lost in asp.net
<p>i have 10 list boxes in my aspx page for all 10 list boxes same function is using for some buttons i want to add listbox data to grid can you help me  my java script code shown below</p>

<p></p>

<pre><code>function MoveItem(ctrlSource, ctrlTarget) {

   var Source = document.getElementById(ctrlSource);

   var Target = document.getElementById(ctrlTarget);



   if ((Source != null) &amp;&amp; (Target != null)) {

       while ( Source.options.selectedIndex &gt;= 0 ) {

           var newOption = new Option(); // Create a new instance of ListItem

           newOption.text = Source.options[Source.options.selectedIndex].text;

           newOption.value = Source.options[Source.options.selectedIndex].value;



           Target.options[Target.length] = newOption; //Append the item in Target

           Source.remove(Source.options.selectedIndex);  //Remove the item from Source

       }

   }
</code></pre>

<p>}</p>

<p>i tried a javascript above code to move items between listbox using html input button problem when i trying to save listbox.items.count giving 0 can anyone tell me why this happening and also when post back occurs listbox items lost.</p>
