jquery禁用按钮

$('#sub').click(function () {
    var self = $(this);                        
    if( oneshotbtn(self,2000,'#01b637') ){
        return false;
    }
});

function oneshotbtn(btn_el,delay,color) {
    oneshotbtn.submit_flag = oneshotbtn.submit_flag || false;

    setTimeout(function () {
        oneshotbtn.submit_flag = true;
        btn_el.css('background-color','#888');
        btn_el.prop('disabled', true);
    }, 10);
    setTimeout(function () {
        oneshotbtn.submit_flag = false;
        btn_el.css('background-color',color);
        btn_el.prop('disabled', false);
    }, delay);            
    return oneshotbtn.submit_flag;
}