script.js

var codeSecurity = function() {
					document.onkeydown = function(e) {
                        if (e.keyCode === 123 || (e.ctrlKey && 
                            (e.keyCode === 67 || 
                             e.keyCode === 115 ||
                             e.keyCode === 99 ||
                             e.keyCode === 85 || 
                             e.keyCode === 117))) {
                            return false;
                        } else {
                            return true;
                        }
                    };
                	
                	document.addEventListener("contextmenu", function(e){
                      e.preventDefault();
                    }, false);
                    
                    $(document).keypress("u",function(e) {
                      if(e.ctrlKey){return false;}
                      else {return true;}
                    });
				}