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

$('#walkingRail').click(function(){
    document.getElementById("change_img").src = "/bizdemo57105/img/pro_img/pro_main_5_1.jpg";
    document.getElementById("change_img0").src = "/bizdemo57105/img/pro_img/walkingrail.jpg";

});

$('#walkingSling').click(function(){
    document.getElementById("change_img").src = "/bizdemo57105/img/pro_img/pro_main_5_2.jpg";
    document.getElementById("change_img0").src = "/bizdemo57105/img/pro_img/silversling.jpg";
});

$('#SliverSling').click(function(){
    document.getElementById("change_img").src = "/bizdemo57105/img/pro_img/pro_main_9_3.jpg";
    document.getElementById("change_img0").src = "/bizdemo57105/img/pro_img/walkingsling.jpg";
}); 

$('#EasySpider').click(function(){
    document.getElementById("change_img").src = "/bizdemo57105/img/pro_img/pro_main_23_2.png";
    document.getElementById("change_img0").src = "/bizdemo57105/img/pro_img/easyspider.jpg";
});