How to highlight a button?

"create it as context-sensitive"?
Can you show me how?

Actually I was thinking to create a button for those headers instead of using the combo dropdown box as a practice.
Could you tell me what I should change to make it work as other button like "bold" "italic"?





var FCKKidsFormat = function( name )
{
this.Name = name ;
}

FCKKidsFormat.prototype.Execute = function()
{
switch ( this.Name )
{
case 'FormatH1' :
FCK.ExecuteNamedCommand( 'FormatBlock', '<h1>' ) ;
break;
default :
}
}

FCKKidsFormat.prototype.GetState = function()
{
return FCKSelection.HasAncestorNode('h1') ? FCK_TRISTATE_ON : FCK_TRISTATE_OFF;
}

FCKCommands.RegisterCommand( 'KidsFormatH1', new FCKKidsFormat( 'FormatH1' ) ) ;

var oKidsItem = new FCKToolbarButton( 'KidsFormatH1', FCKLang['KidsFormatH1Title'] ) ;
oKidsItem.IconPath = FCKConfig.PluginsPath + 'kidsformat/h1.gif';
FCKToolbarItems.RegisterItem( 'KidsFormatH1', oKidsItem ) ;

I think I didn't state my problem clearly.

I was talking about the blue highlight but not enable and disable.

I did put the similar code into the GetState function but somehow it will only run once when I first load the FCKeditor. The state won't change again once I click the mouse on edit area or do anything else.

thx for replied.

finally I got you.

the contextSensitive atribute in the FCKToolbarButton function.

Thanks so much.