禁止页面选择，右击相关操作

document.oncontextmenu = new Function("return false;");

document.ondragstart = new Function("return false;");

document.onselectstart = new Function("return false;");
document.onselect = new Function("return false;");
document.onbeforecopy = new Function("return false;");
document.oncopy = new Function("return false;");
document.oncut = new Function("return false;");

document.onmouseup = new Function("return false;");