Version

controlDisabledCssClass Property

the css class that will be applied on the control's div when the control is disabled indicates the CssClass for disabled state of the control
Syntax
ASP.NET Ajax Javascript (Specification) 
function get_controlDisabledCssClass() : String
ASP.NET Ajax Javascript (Usage) 
var resultVar = instanceOfWebDropDown.get_controlDisabledCssClass();
See Also