Javascript 整理 屏蔽 F1，F5，F11，Shift+F10，Alt+F4，Ctrl+N，Alt+ 方向键 ←，Alt+ 方向键 →，退格键，shift 加鼠标左键新开一网页，Ctrl+R

/* 屏蔽 F1 屏蔽 F5 屏蔽 F11 屏蔽 Shift+F10 屏蔽 Alt+F4 屏蔽 Ctrl+N 屏蔽 Alt+ 方向键 ← 屏蔽 Alt+ 方向键 → 屏蔽 8 退格键 屏蔽 shift 加鼠标左键新开一网页 屏蔽 Ctrl+R */ function window.onhelp() {return false; } document.onkeydown = function() { if ((window.event.keyCode == 116) || //屏蔽 F5 (window.event.keyCode == 122) || //屏蔽 F11 (window.event.shiftKey && window.event.keyCode == 121) //shift+F10 ) { window.event.keyCode = 0; //alert(); window.event.returnValue = false; } if ((window.event.altKey) && (window.event.keyCode == 115)) { //屏蔽Alt+F4 //alert(); window.showModelessDialog("about:blank", "", "dialogWidth:1px;dialogheight:1px"); return false; } if ((window.event.ctrlKey) && (window.event.keyCode == 78)) {//屏蔽 Ctrl+n //alert(); window.event.returnValue = false; } if ((window.event.altKey) && ((window.event.keyCode == 37) || //屏蔽 Alt+ 方向键 ← (window.event.keyCode == 39))) { //屏蔽 Alt+ 方向键 → //alert("不准你使用ALT+方向键前进或后退网页！"); window.event.returnValue = false; } if ((event.keyCode == 8) && (window.event.srcElement.type != "text" && window.event.srcElement.type != "textarea" && window.event.srcElement.type != "password")) //屏蔽退格删除键 { //alert("不准你使用退格键前进或后退网页！"); window.event.returnValue = false; } if (window.event.srcElement.tagName == "A" && window.event.shiftKey) { //alert(); window.event.returnValue = false; //屏蔽 shift 加鼠标左键新开一网页 } if ((window.event.ctrlKey && window.event.keyCode == 82)) { // alert(); window.event.returnValue = false; //屏蔽 Ctrl+R } }