//========BEGIN OF Javascript Include=========================================//
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;


if (document.layers){
	document.captureEvents(Event.MOUSEDOWN);
	document.onmousedown=clickNS;}
else{
	document.onmouseup=clickNS;
	document.oncontextmenu=clickIE;
}

document.oncontextmenu=new Function("return false")
//===================================================================================//
document.onmousedown=right;
document.onmouseup=right;


//===================================================================================//
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;
	window.captureEvents(Event.MOUSEDOWN);
	window.captureEvents(Event.MOUSEUP);
}

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

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

	if	(sTag == "textarea" || (sTag == "input" && (sTagType == "text" || sTagType == "password")) //allow these keys inside a text box
		&& (nKeyCode == asciiBack 
				|| nKeyCode == asciiSHIFT 
				|| nKeyCode == asciiHome 
				|| bShiftPressed 
				|| (bCtrlPressed && (nKeyCode == asciiLeftArrow || nKeyCode == asciiRightArrow))
			)
		){
		return true;
	}else if(bAltPressed && (nKeyCode == asciiLeftArrow || nKeyCode == asciiRightArrow)){ // block alt + left or right arrow
		bRet = false;
	}else if(bCtrlPressed && (sChar == 'A' || sChar == 'C' || sChar == 'V' || sChar == 'X')){ // Capture and control asciiCTRL except for cut, copy and paste, and SELECT ALL
		bRet = true;
	}else if(bShiftPressed && nKeyCode == asciiTab){//allow shift + tab
		bRet = true;
	}else if(bIsFunctionKey){ // Capture and stop these keys
		bRet = false;
	}else if(
				(bCtrlPressed && nKeyCode != asciiCTRL) 
				|| (bShiftPressed && nKeyCode != asciiSHIFT) 
				|| (bAltPressed && nKeyCode != asciiALT)
			){ //block ALL other sequences
		bRet = false;
	}
	
	if(!bRet){
		try{
			oEvent.returnValue = false;
			oEvent.cancelBubble = true;

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

function right(e) {
    if (navigator.appName == 'Netscape' && (e.which == 3 || e.which == 2))
		return false;
    else if (navigator.appName == 'Microsoft Internet Explorer' && (event.button == 2 || event.button == 3)) {
        window.status = msg;
        return false;
    }
    return true;
}

function clickIE() {
	if (document.all) {
		window.status = msg;
		return false;
	}
}
function clickNS(e) {
	if(document.layers ||(document.getElementById && !document.all)) {
		if (e.which == 1 || e.which == 2 || e.which ==3) {
			window.status = msg;
			return false;
		}
	}
}
//===================================================================================//
//========END OF Javascript Include=========================================//