禁用F12和鼠标右键，防止查看控制台代码

虽然是个治标不治本的办法，还是挺有用的

在禁用同时，自身的代码健壮性也需要加强

// 屏蔽F12
document.onkeydown = function () {
//f12键
if (window.event && window.event.keyCode == 123) {
event.keyCode = 0;
event.returnValue = false;
}
// enter键
// if (window.event && window.event.keyCode == 13) {
//     window.event.keyCode = 505;
// }
// backspace键
// if (window.event && window.event.keyCode == 8) {
//     alert(str   "\n请使用Del键进行字符的删除操作！");
//     window.event.returnValue = false;
// }
};
// 屏蔽右键菜单 
document.oncontextmenu = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
};
// 屏蔽粘贴
document.onpaste = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
};
// 屏蔽复制
document.oncopy = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
};
// 屏蔽剪切
document.oncut = function (event) {
if (window.event) {
event = window.event;
}
try {
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")) {
return false;
}
return true;
} catch (e) {
return false;
}
};