You can extend the 'setBorder' method to display or hide the border dynamically.
$.extend($.fn.textbox.methods, {
setBorder: function(jq, border){
var style = $('#easyui-textbox-border');
if (!style.length){
$('head').append(
'<style id="easyui-textbox-border">' +
'.textbox-noborder{border-color:transparent;border-radius:0}' +
'</style>'
);
}
return jq.each(function(){
var span = $(this).next();
if (border) {
span.removeClass('textbox-noborder');
} else {
span.addClass('textbox-noborder');
}
});
}
})
Usage example:
$('#tt').textbox('setBorder', false); // hide the border
$('#tt').textbox('setBorder', true); // display the border