javascript 屏蔽F5，BackSpace等各种按键

1. functionDisableF5(){
2. with(event){
3. //F5andCtrl+R
4. if(keyCode==116||(ctrlKey&&keyCode==82)){
5. event.keyCode=0;
6. event.cancelBubble=true;
7. returnfalse;
8. }
9. }
10. }
12. document.onkeydown=DisableF5;

Java代码

1. functiondocument.onkeydown()
2. {
3. if((event.keyCode==8)||//屏蔽退格删除键
4. (event.keyCode==116)||//屏蔽F5刷新键
5. (event.ctrlKey&&event.keyCode==82)){//Ctrl+R
6. event.keyCode=0;
7. event.returnValue=false;
8. }
9. }

一，js屏蔽浏览器（IE和Firefox）的刷新功能

1. document.onkeydown=function()
2. {
3. if((window.event.keyCode==116)||//屏蔽F5
4. (window.event.keyCode==122)||//屏蔽F11
5. (window.event.shiftKey&&window.event.keyCode==121)//shift+F10
6. )
7. {
8. window.event.keyCode=0;
9. window.event.returnValue=false;
10. }
11. if((window.event.altKey)&&(window.event.keyCode==115))
12. {
13. //屏蔽Alt+F4
14. window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
15. returnfalse;
16. }
17. }

二，js屏蔽浏览器右键功能

1. if(window.Event)
2. document.captureEvents(Event.MOUSEUP);
3. functionnocontextmenu()
4. {
5. event.cancelBubble=true
6. event.returnValue=false;
7. returnfalse;
8. }
9. functionnorightclick(e){
10. if(window.Event){
11. if(e.which==2||e.which==3)
12. returnfalse;
13. }
14. else
15. if(event.button==2||event.button==3){
16. event.cancelBubble=true
17. event.returnValue=false;
18. returnfalse;
19. }
20. }
21. document.oncontextmenu=nocontextmenu;//forIE5+
22. document.onmousedown=norightclick;//forallothers