# Separators
## Defining separators
To make a RadComboBoxItem separator you should simply mark the item with IsSeparator="True"
```ASPNET
```
```C#
RadComboBoxItem item = new RadComboBoxItem();
item.Text = "Separator";
item.IsSeparator = true;
```
```VB.NET
Dim item As RadComboBoxItem = New RadComboBoxItem()
item.Text = "Separator"
item.IsSeparator = true
```
## Client-side methods
At the client-side, you can check whether an item is a separator using the **get_isSeperator()** method:
```JavaScript
var comboBox = $find("<%=RadComboBox1.ClientID %>");
var item = comboBox.findItemByText("Separator");
if (item.get_isSeparator()) {
alert("The item is a separator");
}
```
To make an item a separator, you can use the **set_isSeparator()** method:
```JavaScript
var comboBox = $find("<%=RadComboBox1.ClientID %>");
var item = comboBox.findItemByText("Separator");
item.set_isSeparator(true);
```
## Css Classes
The CSS class applied to the RadComboBox separators is called:
**rcbSeparator**
To define your custom appearance you should simply add a style to the **``** tag of your aspx page holding the combobox:
```ASPNET
```