禁用浏览器操作

// 屏蔽键盘按键
$(window).on('keydown', function(e){
    var keycode = e.keyCode || e.which;

    if(e.ctrlKey && keycode == 187){   //屏蔽Ctrl+ '+'
        e.preventDefault();
        window.event.returnValue = false;
    }
    if(e.ctrlKey && keycode == 189){   //屏蔽Ctrl+ '-'
        e.preventDefault();
        window.event.returnValue = false;
    }
});

// 禁止Ctrl+滚轮缩放页面
        var scrollFunc=function(e){
    e=e || window.event;
    if(e.wheelDelta && event.ctrlKey){//IE/Opera/Chrome
        event.returnValue=false;
    }else if(e.detail){//Firefox
        event.returnValue=false;
    }
}

/*注册事件*/
if(document.addEventListener){
    document.addEventListener('DOMMouseScroll',scrollFunc,false);
}//W3C
window.onmousewheel=document.onmousewheel=scrollFunc;
window.onload=function(){
    document.onmousewheel = function(){
        if(event.ctrlKey)
            return false;
    }
}