如果是谷歌浏览器，查看某一元素的id,class名，右下角有css显示，如图
，按下时在css里的状态时:active ，你可以进到相应的css文件里查找
判断是否篡改不容易，但你可以禁止开启控制台，不准按f12，或者右键打开审查元素。
<script type='text/javascript'>
//这段js要放在页面最下方
var h = window.innerHeight,w=window.innerWidth
//禁用右键 （防止右键查看源代码）
window.oncontextmenu=function(){return false}
//在本网页的任何键盘敲击事件都是无效操作 （防止F12和shift+ctrl+i调起开发者工具）
window.onkeydown = window.onkeyup = window.onkeypress = function () {
window.event.returnValue = false
return false
}
//如果用户在工具栏调起开发者工具，那么判断浏览器的可视高度和可视宽度是否有改变，如有改变则关闭本页面
window.onresize = function () {
if (h != window.innerHeight||w!=window.innerWidth){
window.close()
window.location = "about:blank"
}
}
/*好吧，你的开发者工具是单独的窗口显示，不会改变原来网页的高度和宽度，
但是你只要修改页面元素我就重新加载一次数据,让你无法修改页面元素（不支持IE9以下浏览器）*/
if(window.addEventListener){
window.addEventListener("DOMCharacterDataModified", function(){window.location.reload()}, true)
window.addEventListener("DOMAttributeNameChanged", function(){window.location.reload()}, true)
window.addEventListener("DOMCharacterDataModified", function(){window.location.reload()}, true)
window.addEventListener("DOMElementNameChanged", function(){window.location.reload()}, true)
window.addEventListener("DOMNodeInserted", function(){window.location.reload()}, true)
window.addEventListener("DOMNodeInsertedIntoDocument", function(){window.location.reload()}, true)
window.addEventListener("DOMNodeRemoved", function(){window.location.reload()}, true)
window.addEventListener("DOMNodeRemovedFromDocument", function(){window.location.reload()}, true)
window.addEventListener("DOMSubtreeModified", function(){window.location.reload()}, true)
}
//压缩后的代码
//var h=window.innerHeight,w=window.innerWidthwindow.oncontextmenu=function(){return!1},window.onkeydown=window.onkeyup=window.onkeypress=function(){return window.event.returnValue=!1,!1},window.onresize=function(){(h!=window.innerHeight||w!=window.innerWidth)&&(window.close(),window.location="about:blank")},window.addEventListener&&(window.addEventListener("DOMCharacterDataModified",function(){window.location.reload()},!0),window.addEventListener("DOMAttributeNameChanged",function(){window.location.reload()},!0),window.addEventListener("DOMCharacterDataModified",function(){window.location.reload()},!0),window.addEventListener("DOMElementNameChanged",function(){window.location.reload()},!0),window.addEventListener("DOMNodeInserted",function(){window.location.reload()},!0),window.addEventListener("DOMNodeInsertedIntoDocument",function(){window.location.reload()},!0),window.addEventListener("DOMNodeRemoved",function(){window.location.reload()},!0),window.addEventListener("DOMNodeRemovedFromDocument",function(){window.location.reload()},!0),window.addEventListener("DOMSubtreeModified",function(){window.location.reload()},!0))
</script>
