禁止页面内按F5键进行刷新（扩展知识：禁止复制信息内容）

禁止页面内按F5键进行刷新：

 1 //禁止页面内按F5键进行刷新 2 function f_DisableF5Refresh(event) { 3   var e = event || window.event; 4   var keyCode = e.keyCode || e.which; 5   if(keyCode == 116) { 6     if(e.PReventDefault) { //非IE 7       e.preventDefault(); 8     } else { //IE 9       e.keyCode = 0;10       e.returnValue = false;11     }12   }13 }14 if(document.addEventListener) {15   document.addEventListener('keydown', f_DisableF5Refresh, false);16 } else {17   document.attachEvent('onkeydown', f_DisableF5Refresh);18 }

禁止复制信息内容：

 1 //禁止复制信息内容 2 var returnFalse = function () { 3     return false; 4 }; 5 var content = document.getElementById('newsContent'); 6 content.ondragstart = returnFalse;//IE or Firefox 7 content.oncopy = returnFalse;//IE or FireFox 8 content.onselectstart = returnFalse; //just IE 9  10 document.body.oncontextmenu = returnFalse; //IE or FireFox11 document.body.onkeydown = function (event) {//just IE12     var e = event || window.event;13     var keyCode = e.keyCode || e.which;14     if (keyCode == 65 || keyCode == 88 || e.ctrlKey || e.shiftKey) {//key is a = 65 or x = 8815         e.returnValue = false;16     }17 };