//
// Requires:
//	No external dependency.
//
var sessionWindowName = 'lcsdWindow';

function openSessionWindow(destination) {
	if ( !destination ) {
		destination = '../../blank.html';
	}

	/*	
	var w=800
	var h=600
	if (window.screen) {
	   w = window.screen.availWidth;
	   h = window.screen.availHeight;
	}
	
	var sessionWin = window.open(destination, sessionWindowName, 'width='+w+',height='+h+',top=0, left=0,menubar=no,scrollbars=yes,status=yes');
	if ( sessionWin ) {
		// open window may be blocked
		sessionWin.focus();
	}
	*/
	window.location.href= destination;
}

function isSessionWindow() {
//	return window.name == sessionWindowName;
	return true;
}

function getSessionWindowName() {
	return sessionWindowName;
}

//
// Ensure the current page is opened in Session Window
//
function checkInSessionWindow() {
	if ( !isSessionWindow() ) {
		var destination = window.location.href;
		window.location = 'index.do';
		openSessionWindow(destination);
	}
}

//
// Make session window to goto the destined link
//
function openInSessionWindow(destination) {
	if ( isSessionWindow() ) {
		window.location = destination;
	} else {
		openSessionWindow(destination);
	}
}

//
// Disable key press and mouse click on session window
//
function protectSessionWindow() {
	if ( isSessionWindow() ) {
		disableKeyPress();
		disableClick();
	}
}

//
// Tim Cartwright on http://www.faqts.com/knowledge_base/view.phtml/aid/32261
//
var msg = 'That functionality is restricted.';
var asciiBack	    = 8;
var asciiTab	    = 9;
var asciiSHIFT	    = 16;
var asciiCTRL	    = 17;
var asciiALT	    = 18;
var asciiHome	    = 36;
var asciiLeftArrow  = 37;
var asciiRightArrow = 39;
var asciiMS	    = 92;
var asciiView	    = 93;
var asciiF1	    = 112;
var asciiF2	    = 113;
var asciiF3	    = 114;
var asciiF4	    = 115;
var asciiF5	    = 116;
var asciiF6	    = 117;
var asciiF11	    = 122;
var asciiF12	    = 123;
var asciiF11	    = 122;

function disableKeyPress() {
	if(document.all){ //ie has to block in the key down
		document.onkeydown = onKeyPress;
	} else if (document.layers || document.getElementById){ //NS and mozilla have to block in the key press
		document.onkeypress = onKeyPress;
	}
}

function onKeyPress(evt) {
    window.status = '';
    //get the event object
    var oEvent = (window.event) ? window.event : evt;

    //hmmm in mozilla this is jacked, so i have to record these seperate
    //what key was pressed
    var nKeyCode =  oEvent.keyCode ? oEvent.keyCode :
		    oEvent.which ? oEvent.which :
		    void 0;

    var bIsFunctionKey = false;

    //hmmm in mozilla the keycode would contain a function key ONLY IF the charcode IS 0
    //else key code and charcode read funny, the charcode for 't'
    //returns 116, which is the same as the ascii for F5
    //SOOO,... to check if a the keycode is truly a function key,
    //ONLY check when the charcode is null OR 0, IE returns null, mozilla returns 0
    if(oEvent.charCode == null || oEvent.charCode == 0){
	bIsFunctionKey = (nKeyCode >= asciiF2 && nKeyCode <= asciiF12) ||
			    (
				nKeyCode == asciiALT
				|| nKeyCode == asciiMS
				|| nKeyCode == asciiView
				|| nKeyCode == asciiHome
				|| nKeyCode == asciiBack
			    )
    }

    //convert the key to a character, makes for more readable code
    var sChar = String.fromCharCode(nKeyCode).toUpperCase();

    //get the active tag that has the focus on the page, and its tag type
    var oTarget = (oEvent.target) ? oEvent.target : oEvent.srcElement;
    var sTag = oTarget.tagName.toLowerCase();
    var sTagType = oTarget.getAttribute("type");

    var bAltPressed = (oEvent.altKey) ? oEvent.altKey : oEvent.modifiers & 1 > 0;
    var bShiftPressed = (oEvent.shiftKey) ? oEvent.shiftKey : oEvent.modifiers & 4 > 0;
    var bCtrlPressed = (oEvent.ctrlKey) ? oEvent.ctrlKey : oEvent.modifiers & 2 > 0;
    //var bMetaPressed = (oEvent.metaKey) ? oEvent.metaKey : oEvent.modifiers & 8 > 0;

    var bRet = true; //assume true as that will be the case most times
    //alert (nKeyCode + ' ' + sChar + ' ' + sTag + ' ' + sTagType + ' ' + bShiftPressed + ' ' + bCtrlPressed + ' ' + bAltPressed);

    if (sTagType != null) {
	sTagType = sTagType.toLowerCase();
    }

    //allow these keys inside a text box
    if	(sTag == "textarea" || (sTag == "input" && (sTagType == "text" || sTagType == "password"))) {
	return true;
    } else if (bAltPressed && (nKeyCode == asciiLeftArrow || nKeyCode == asciiRightArrow)){ // block alt + left or right arrow
	bRet = false;
    } else if (bCtrlPressed && (sChar == 'N' || sChar == 'R' || sChar == 'P')){ // Disable Ctrl-N, Ctrl-O, Ctrl-P
	bRet = false;
    } else if (bIsFunctionKey){ // Capture and stop these keys
	bRet = false;
    }

    if(!bRet){
	try{
	    oEvent.returnValue = false;
	    oEvent.cancelBubble = true;

	    if(document.all){ //IE
		oEvent.keyCode = 0;
	    }else{ //NS
		oEvent.preventDefault();
		oEvent.stopPropagation();
	    }
	}catch(ex){
	}
    }
    return bRet;
}

function disableClick() {
	document.oncontextmenu = function(){return false}
	/*
	if(document.layers) {
		window.captureEvents(Event.MOUSEDOWN);
		window.onmousedown =
			function(e){
				if(e.target==document) return false;
			}
	} else {
		document.onmousedown = function(){ return false }
	}
	*/
}