Version

inputDisabledCssClass Property

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