26 lines
823 B
JavaScript
26 lines
823 B
JavaScript
/**
|
|
* When included, this snippet prevents contextual menus and keystrokes that
|
|
* make it possible to cut/paste/copy text from the page.
|
|
* This is useful for very secure exams.
|
|
* @author Alberto Torreblanca
|
|
*/
|
|
$(document).ready(function(){
|
|
$(document).on("cut copy paste contextmenu",function(e) {
|
|
e.preventDefault();
|
|
});
|
|
$(document).keydown(function(e) {
|
|
var forbiddenKeys = new Array('c', 'x', 'v', 'p', 's');
|
|
var keyCode = (e.keyCode) ? e.keyCode : e.which;
|
|
var isCtrl;
|
|
isCtrl = e.ctrlKey
|
|
if (isCtrl) {
|
|
for (i = 0; i < forbiddenKeys.length; i++) {
|
|
if (forbiddenKeys[i] == String.fromCharCode(keyCode).toLowerCase()) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
});
|
|
});
|