屏蔽F12审查元素，禁止修改页面代码

一、前言众所周知审查元素的情况下大家都可以随机更改一部分页面的代码注入恶意JS等等这种情况避免也不难虽然还能看到一部分H5源码但是无法修改。二、屏蔽F12 审查元素document.onkeydownfunction(){if(window.eventwindow.event.keyCode123){alert(F12被禁用);event.keyCode0;event.returnValuefalse;}if(window.eventwindow.event.keyCode13){window.event.keyCode505;}if(window.eventwindow.event.keyCode8){alert(str\n请使用Del键进行字符的删除操作);window.event.returnValuefalse;}}三、屏蔽右键菜单document.oncontextmenufunction(event){if(window.event){eventwindow.event;}try{vartheevent.srcElement;if(!((the.tagNameINPUTthe.type.toLowerCase()text)||the.tagNameTEXTAREA)){returnfalse;}returntrue;}catch(e){returnfalse;}}四、屏蔽粘贴document.onpastefunction(event){if(window.event){eventwindow.event;}try{vartheevent.srcElement;if(!((the.tagNameINPUTthe.type.toLowerCase()text)||the.tagNameTEXTAREA)){returnfalse;}returntrue;}catch(e){returnfalse;}}五、屏蔽复制document.oncopyfunction(event){if(window.event){eventwindow.event;}try{vartheevent.srcElement;if(!((the.tagNameINPUTthe.type.toLowerCase()text)||the.tagNameTEXTAREA)){returnfalse;}returntrue;}catch(e){returnfalse;}}六、屏蔽剪切document.oncutfunction(event){if(window.event){eventwindow.event;}try{vartheevent.srcElement;if(!((the.tagNameINPUTthe.type.toLowerCase()text)||the.tagNameTEXTAREA)){returnfalse;}returntrue;}catch(e){returnfalse;}}这种很适合小说网站毕竟版权珍贵被别人随意copy走内容就不好了七、屏蔽选中document.onselectstartfunction(event){if(window.event){eventwindow.event;}try{vartheevent.srcElement;if(!((the.tagNameINPUTthe.type.toLowerCase()text)||the.tagNameTEXTAREA)){returnfalse;}returntrue;}catch(e){returnfalse;}}