add custom class in textbox

[Opan Mustopah]

night all,

i want to know, it is possible adding a custom class in textbox plugin?
when i add easyui-textbox in some input element, it will generate span element with class textbox, so i want add my custom class into span element,

i already try this:

Code:

$(function(){
		$('span.textbox').addClass('input-field');
	});

but didn't work.
thanks in advance