Client-side Events

<?php
...
	$listbox->ClientEvents["OnBeforeCheck"] = "Handle_OnBeforeCheck";
...
?>
...
<script type="text/javascript">
	function Handle_OnBeforeCheck(item,args)
	{
		//args["Item"]: The checked item.	
		return true; // Approve action
	}
</script>

<?php
...
	$listbox->ClientEvents["OnBeforeDelete"] = "Handle_OnBeforeDelete";
...
?>
...
<script type="text/javascript">
	function Handle_OnBeforeDelete(item,args)
	{
		//args["Data"]: Data of deleted item.	
		return true; // Approve action
	}
</script>

<?php
...
	$listbox->ClientEvents["OnBeforeReorder"] = "Handle_OnBeforeReorder";
...
?>
...
<script type="text/javascript">
	function Handle_OnBeforeReorder(item,args)
	{
		//args["From"]: The position that the item is moved from.
		//args["To"]: The position that the item is moved to.		
		return true; // Approve action
	}
</script>

<?php
...
	$listbox->ClientEvents["OnBeforeSelect"] = "Handle_OnBeforeSelect";
...
?>
...
<script type="text/javascript">
	function Handle_OnBeforeSelect(item,args)
	{
		//args["Item"]: The selected item.
		return true; // Approve action
	}
</script>

<?php
...
	$listbox->ClientEvents["OnBeforeTransfer"] = "Handle_OnBeforeTransfer";
...
?>
...
<script type="text/javascript">
	function Handle_OnBeforeTransfer(listbox,args)
	{
		//args["Destination"]: The destination listbox.
		//args["Item"]: The item that will be transfered.
		return true; // Approve action
	}
</script>

<?php
...
	$listbox->ClientEvents["OnBeforeUnCheck"] = "Handle_OnBeforeUnCheck";
...
?>
...
<script type="text/javascript">
	function Handle_OnBeforeUnCheck(item,args)
	{
		//args["Item"]: The un-checked item.	
		return true; // Approve action
	}
</script>

<?php
...
	$listbox->ClientEvents["OnBeforeUnSelect"] = "Handle_OnBeforeUnSelect";
...
?>
...
<script type="text/javascript">
	function Handle_OnBeforeReorder(item,args)
	{
		//args["Item"]: The un-selected item.	
		return true; // Approve action
	}
</script>

<?php
...
	$listbox->ClientEvents["OnCheck"] = "Handle_OnCheck";
...
?>
...
<script type="text/javascript">
	function Handle_OnCheck(item,args)
	{
 
		//args["Item"]: The checked item.
 
		alert("Item is checked.");
	}
</script>

<?php
...
	$listbox->ClientEvents["OnDelete"] = "Handle_OnDelete";
...
?>
...
<script type="text/javascript">
	function Handle_OnDelete(item,args)
	{
 
		//args["Data"]: Data of deleted item.	
 
		alert("Item is deleted.");
	}
</script>

<?php
...
	$listbox->ClientEvents["OnReorder"] = "Handle_OnReorder";
...
?>
...
<script type="text/javascript">
	function Handle_OnReorder(item,args)
	{
 
		//args["From"]: The position that the item is moved from.
		//args["To"]: The position that the item is moved to.			
 
		alert("Item is reordered.");
	}
</script>

<?php
...
	$listbox->ClientEvents["OnSelect"] = "Handle_OnSelect";
...
?>
...
<script type="text/javascript">
	function Handle_OnSelect(item,args)
	{
 
		//args["Item"]: The selected item.
		alert("Item is selected.");
	}
</script>

<?php
...
	$listbox->ClientEvents["OnTransfer"] = "Handle_OnTransfer";
...
?>
...
<script type="text/javascript">
	function Handle_OnTransfer(listbox,args)
	{
 
		//args["Destination"]: The destination listbox.
		//args["Data"]: The data of item that was transferred.		
 
		alert("Item is transferred.");
	}
</script>

<?php
...
	$listbox->ClientEvents["OnUnCheck"] = "Handle_OnUnCheck";
...
?>
...
<script type="text/javascript">
	function Handle_OnUnCheck(item,args)
	{
 
		//args["Item"]: The un-checked item.	
 
		alert("Item is un-checked.");
	}
</script>

<?php
...
	$listbox->ClientEvents["OnUnSelect"] = "Handle_OnUnSelect";
...
?>
...
<script type="text/javascript">
	function Handle_OnUnSelect(item,args)
	{
 
		//args["Item"]: The un-selected item.		
 
		alert("Item is un-selected .");
	}
</script>