Javascript disables keyboard function keys and makes right-click and other keys invalid

Javascript disables keyboard function keys and makes right-click and other keys invalid_javascript tips

WBOY

Release： 2016-05-16 17:20:36

Original

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Copy code The code is as follows:

The red display above can be inserted into the web page to invalidate the right mouse click
onselectstart="return false" prohibits selection, ondragstart="return false" prohibits drag and drop, oncopy=document.selection.empty () Copying prohibited.

Disable saving: , placed in the head.

Disable pasting:

Turn off input method:

Disable the right mouse button:
function document.oncontextmenu(){event.returnValue=false;}

Disable F1 help:
function window.onhelp(){return false}

Block other keys

Copy code The code is as follows:

 
function document.onkeydown() 
{ 
if ((window.event.altKey)&& 
((window.event.keyCode==37)|| //Shield Alt arrow key← 
(window.event.keyCode= =39))) //Block the Alt direction key→ 
{ 
alert("You are not allowed to use the ALT direction key to move forward or backward on the web!"); 
event.returnValue=false; 
} 
/* Note: This is not really shielding the Alt direction key. 
Because when the Alt direction key pops up a warning box, hold down the Alt key. 
Click the warning box with the mouse. This shielding method It fails. In the future, 
 if any expert has a real way to block the Alt key, please let me know. */ 
if ((event.keyCode==8) || //Shield the backspace delete key
(event.keyCode==116)|| //Shield 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;} //Shield F11 
if (event.ctrlKey && event.keyCode==78) event.returnValue=false; //Shield Ctrl n 
if (event. shiftKey && event.keyCode==121)event.returnValue=false; //Shield shift F10 
if (window.event.srcElement.tagName == "A" && window.event.shiftKey) 
window.event .returnValue = false; //Shield shift and left mouse button to open a new web page
if ((window.event.altKey)&&(window.event.keyCode==115)) //Shield Alt F4 
{ 
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); 
return false; 
} 
} 