$('.p_sub_menu').click(function(){
    $('.p_sub_menu').removeClass('oncolor');
    $(this).addClass('oncolor');
  });

$('#silverSling').click(function(){
    document.getElementById("change_img0").src = "/bizdemo57105/img/pro_img/silversling.jpg";
    document.getElementById("change_img").src = "/bizdemo57105/img/pro_img/pro_main_9_3.jpg";
    $('.video_1').css({
        'display':'none'
    });
    $('#change_img2').css({
        'display':'none'
    });
});

$('#newtonSling1').click(function(){
    document.getElementById("change_img0").src = "/bizdemo57105/img/pro_img/newtonsling1.jpg";
    document.getElementById("change_img").src = "/bizdemo57105/img/pro_img/pro_main_9_1.jpg";
    document.getElementById("change_img2").src = "/bizdemo57105/img/pro_img/pro_main_9_2.jpg";
    $('.video_1').css({
        'display':'block'
    });
    $('#change_img2').css({
        'display':'block'
    });
});