How does js disable page refresh and rewind?

How does js disable page refresh and rewind?

This article describes how to disable page refresh and rewind in js. Share it with you for your reference. The specific implementation method is as follows:

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<Script language = "javascript"> // Disable the F5 key Function document. onkeydown () { If (event. keyCode = 116) { Event. keyCode = 0; Event. cancelBubble = true; Return false; } } // Disable context menu Function document. oncontextmenu () { Return false; } // The following Code enables full screen display Function window. onload (){ Var Request = new Array (); // Save the Parameter Var s = location. search. substring (1 ); If (s & s! = ""){ Var list = s. split ("&"); For (var I = 0; I <list. length; I ++ ){ Var pair = list [I]. split ("= "); If (pair [0] & pair [0]! = ""){ Request [unescape (pair [0])] = unescape (pair [1]); } } } Var fullscreen = Request ["fullscreen"]; If (fullscreen! = "Yes "){ Var file = self. location; Var a = window. open ("about: blank", "", "fullscreen = yes "); Self. opener = null; Self. close (); A. location = file + "? Fullscreen = yes "; } } </Script> <Script language = "Javascript"> <! -- // Shield right-click, Ctrl + N, Shift + F10, F11, F5 refresh, and return keys // Author: meizz (plum blossom rain) 2002-6-18 Function document. oncontextmenu () {event. returnValue = false ;} // Right-click the screen Function window. onhelp () {return false} // Shield F1 help Function document. onkeydown () { If (window. event. altKey )&& (Window. event. keyCode = 37) | // mask Alt + direction key seek (Window. event. keyCode = 39) // mask Alt + direction key → { Alert ("You are not allowed to use ALT + arrow keys to move forward or backward the webpage! "); Event. returnValue = false; } /* Note: this does not really block Alt + direction keys, Because when the Alt + direction key pop-up warning box is displayed, press and hold the Alt key, With the mouse clicked off the warning box, this blocking method will become invalid. If Which of the following methods does the master really block the Alt key. */ If (event. keyCode = 8) | // shield the unregeed deletion key (Event. keyCode = 116) | // block the F5 refresh key (Event. ctrlKey & event. keyCode = 82) {// Ctrl + R Event. keyCode = 0; Event. returnValue = false; } If (event. keyCode = 122) {event. keyCode = 0; event. returnValue = false ;} // Block F11 If (event. ctrlKey & event. keyCode = 78) event. returnValue = false; // Block Ctrl + n If (event. shiftKey & event. keyCode = 121) event. returnValue = false; // Block shift + F10 If (window. event. srcElement. tagName = "A" & window. event. shiftKey) Window. event. returnValue = false; // Block shift and use the left mouse button to open a new webpage If (window. event. altKey) & (window. event. keyCode = 115 )) // Block Alt + F4 { Window. showModelessDialog ("about: blank", "", "dialogWidth: 1px; dialogheight: 1px "); Return false; } } </Script>

I hope this article will help you design javascript programs.