You can control the effect of expanding and collapsing by setting $ExpandAnimation and $CollapseAnimation respectively:
	$km->ExpandAnimation->Type = "EaseBoth";
	$km->ExpandAnimation->Duration = 500;
	$km->CollapseAnimation->Type = "EaseBoth";
	$km->CollapseAnimation->Duration = 500;
				
	 
	                                     
	                                    												
													
													<?php
	require $KoolControlsFolder."/KoolMenu/koolmenu.php";
 
	$km = new KoolMenu("km");
	$km->scriptFolder = $KoolControlsFolder."/KoolMenu";
	$km->styleFolder="default";
 
	$km->Add("root","file","File");
 
	$km->Add("file","new","New...");
	$km->Add("new","newfile","File");
	$km->Add("new","newfolder","Folder");
	$km->AddSeparator("file");
	$km->Add("file","open","Open");
	$km->Add("file","close","Close");
	$km->Add("file","save","Save");
	$item = $km->Add("file","saveas","Save as ...");
	$item->Enabled = false;
	$km->Add("file","permission","Permission");
	$km->Add("permission","unrestrict","Unrestricted Access");
	$km->Add("permission","donotattribute","Do not attribute");
 
	$km->Add("root","edit","Edit");
	$km->Add("edit","cut","Cut");
	$km->Add("edit","copy","Copy");
	$km->Add("edit","paste","Paste");
 
	$km->Add("root","view","View");
	$km->Add("view","normal","Normal");
	$km->Add("view","print","Print");
	$km->Add("view","weblayout","Web Layout");
 
	$item = $km->Add("root","help","Help");
	$item->Enabled = false;
 
	$flow_select = "Horizontal";	
	if(isset($_POST["flow_select"]))
	{
		$flow_select = $_POST["flow_select"];
	}
	$km->Flow = $flow_select;
 
?>
 
<form id="form1" method="post">
 
	Select menu flow:
	<select id="flow_select" name="flow_select" onchange="submit();">
		<option value="Horizontal"			<?php if ($flow_select=="Horizontal") echo "selected" ?> >Horizontal</option>
		<option value="Vertical"			<?php if ($flow_select=="Vertical") echo "selected" ?> >Vertical</option>
	</select>
 
	<div style="padding-top:20px;padding-bottom:100px;width:650px;">
		<?php echo $km->Render();?>
	</div>
 
</form>