1. 屏蔽F12 审查元素

// 屏蔽F12 审查元素
document.onkeydown = function(){if(window.event && window.event.keyCode == 123) {alert("F12被禁用");event.keyCode=0;event.returnValue=false;}if(window.event && window.event.keyCode == 13) {window.event.keyCode = 505;}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;}}

2. 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;}
}

3. 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;}
}

4. 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;}
}

5. 屏蔽剪切

// 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;}
}

6. 屏蔽选中

document.onselectstart = 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;}
}