// Filename: DocumentKeyboardInputValidation.js // Author: Steve Morse 04 Sep 2002 // Purpose: Include referenced by stdfooter.asp (see comments there) var mnumReturnKeyCounter = 0; var mbDisplayReturnKeyWindow = false; var mbReturnKeyTimerRunning = false; var mnumReturnKeyTimerDelay = 75; function validateF5KeyboardInput() { if (window.event && window.event.keyCode == 116 && !window.event.altKey) { // is an F5 (without [Alt], else problems!) if (window.mbF5Disabled) { alert('The [F5] key has been disabled'); window.event.keyCode = 17; window.event.cancelBubble = true; window.event.returnValue = false; } else if(window.mstrHTTPMethod && mstrHTTPMethod!='post') { // "get" (or unknown); display message if (confirm('Press OK to refresh.')) window.mbRefresh = true; else // Redirect to Ctrl (this key has no effect in IE) where Cancel pressed window.event.keyCode = 17; } else // "post" - use inbuilt message, but must assume they say OK... window.mbRefresh = true; } } function validateDocumentKeyboardInput() { //Handle F5 key validateF5KeyboardInput(); // Handle press of Enter key if (window.event && window.event.keyCode == 13) { if (window.event.srcElement && window.event.srcElement.type == 'textarea') { //do nothing for text areas } else if (mbReturnKeyTimerRunning) { //Increment Counter where return key pressed mnumReturnKeyCounter = mnumReturnKeyCounter + 1; } else if (mbDisplayReturnKeyWindow == true) { //Open new window where Return Key has been pressed more than 2 times OpenJavascriptOKWindow('Continuous Return Key Input', '

The Return key has been pressed ' + mnumReturnKeyCounter + ' times in the underlying window in ' + mnumReturnKeyTimerDelay + ' milliseconds. This is probably because the Return key was being permanently held down.

To prevent the situation where continuously pressing the Return key causes many hits on the web and database servers this window has been displayed.

Please close this window to return to the underlying window.

', 250, 300, false); //window.open('javascript:','','width=400,height=400,menubar=no,toolbar=no'); mbDisplayReturnKeyWindow = false; mnumReturnKeyCounter = 0; mbReturnKeyDisabled = false; } else { //Set Timer running and make call to ReturnKeyTimer() in 1 second for 1st call in mbReturnKeyTimerRunning = true; mnumReturnKeyCounter = 1; setTimeout("returnKeyTimer()", mnumReturnKeyTimerDelay); } } if (window.event && window.event.keyCode == 17) { // Cancel effects of pressing Control window.event.cancelBubble = true; window.event.returnValue = false; return false; } } function returnKeyTimer() { if (mnumReturnKeyCounter > 2) { mbDisplayReturnKeyWindow = true; } mbReturnKeyTimerRunning = false; } if (document.onkeydown == null) { //Only set onkeydown handler where one isnt already set document.onkeydown = validateDocumentKeyboardInput; }