document.onkeydown=function(e) {
  var event = window.event || e;   
  if (event.keyCode == 116) { 
    event.keyCode = 0;
    return false;
  }else if (event.keyCode == 123) { 
    event.keyCode = 0;
    return false;
  }else if (event.keyCode == 8) { 
    var tt=event.srcElement.type;
    if( tt != 'text'  && tt != 'password'  && tt != 'textarea'  &&  tt != 'submit' ){
      event.keyCode = 0;
      return false;
    }
  }else if (event.keyCode == 82) { 
    if (event.ctrlKey) {        
      event.keyCode = 0;
      return false; 
    }
  }else if(event.keyCode == 37 || event.keyCode == 39){     
    if (event.altKey){  
      
      return false; 
    }
  }else if(event.keyCode == 74 || event.keyCode == 73){
    if (event.ctrlKey && event.shiftKey){  
      event.keyCode = 0;     
      return false; 
    }
  }        
};


function clickIE4(){
  if (event.button==2){
    return false;
  }
}


function clickNS4(e){
  if (document.layers||document.getElementById&&!document.all){
    if (e.which==2||e.which==3){
      return false;
    }
  }
}


if (document.layers){
  document.captureEvents(Event.MOUSEDOWN);
  document.onmousedown=clickNS4;
}else if (document.all&&!document.getElementById){
  document.onmousedown=clickIE4;
}
    
document.oncontextmenu=new Function("return false")
    
document.onkeydown=function(){
  if (window.event && window.event.keycode==116){
    window.keycode=505;
  }
  if (window.event && window.event.keycode==505){
    alert( 'you pressed F5' );
    return false;
  }
}


document.onkeydown = function () {
	var e = event || window.event;
	var keyASCII = parseInt(e.keyCode, 10);
	var src = e.srcElement;
	var tag = src.tagName.toUpperCase();
	
	if(keyASCII == 8) {
		if(src.readOnly || src.disabled || (tag != "INPUT" && tag != "PASSWORD" && tag != "TEXTAREA" && $(e.target).attr('class')!="note-editable")) {
			return false;
		}
		if(src.type) {
			var type = ("" + src.type).toUpperCase();
			return type != "CHECKBOX" && type != "RADIO" && type != "BUTTON" && type != "SUBMIT";
		}
	}
	return true;
}



if (typeof window.event != 'undefined') 
  document.onkeydown = function() 
  {
    var t=event.srcElement.type;
    var kc=event.keyCode;
    return ((kc != 8) || ( t == 'text' ) ||( t == 'password' ) ||
             (t == 'textarea') || ( t == 'submit' ))
  }
else{
  document.onkeypress = function(e)  
    {
    var t=e.target.type;
    var kc=e.keyCode;
    if ((kc != 8 ) || ( t == 'text'  ) ||( t == 'password'  ) ||
        (t == 'textarea') || ( t == 'submit' ))
        return true
    else {
        return false
    }
   }
}




var isSafari = false;
var isOpera = !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;   
var isFirefox = typeof InstallTrigger !== 'undefined';  
var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0;    
var isChrome = !!window.chrome && !isOpera;            
var isIE = /*@cc_on!@*/false || !!document.documentMode; 
var special = (navigator.userAgent.toLowerCase().indexOf('safari/') > -1 && navigator.userAgent.toLowerCase().indexOf('chrome') > -1 );


if (isFirefox || isChrome || isOpera||special || isSafari)
{
  
  if (typeof history.pushState === "function")
  {
    history.pushState("jibberish", null, null);
    
    window.onpopstate = function ()
    {
      history.pushState("newjibberish", null, null);
      history.pushState("newjibberish", null, null);
      history.pushState("newjibberish", null, null);
    };
  }
}else{
  
  if(navigator.appName == 'Netscape'){
	
	 
  if (typeof history.pushState === "function")
  {
    history.pushState("jibberish", null, null);
    
    window.onpopstate = function ()
    {
      history.pushState("newjibberish", null, null);
      history.pushState("newjibberish", null, null);
      history.pushState("newjibberish", null, null);
    };
  }
  }
  
  
  var bajb_backdetect={Version:'1.0.0',Description:'Back Button Detection',Browser:{IE:!!(window.attachEvent&&!window.opera),Safari:navigator.userAgent.indexOf('Apple')>-1,Opera:!!window.opera},FrameLoaded:0,FrameTry:0,FrameTimeout:null,OnBack:function(){alert('Back Button Clicked')},BAJBFrame:function(){var BAJBOnBack=document.getElementById('BAJBOnBack');if(bajb_backdetect.FrameLoaded>1){if(bajb_backdetect.FrameLoaded==2){bajb_backdetect.OnBack();history.back()}}bajb_backdetect.FrameLoaded++;if(bajb_backdetect.FrameLoaded==1){if(bajb_backdetect.Browser.IE){bajb_backdetect.SetupFrames()}else{bajb_backdetect.FrameTimeout=setTimeout("bajb_backdetect.SetupFrames();",700)}}},SetupFrames:function(){clearTimeout(bajb_backdetect.FrameTimeout);var BBiFrame=document.getElementById('BAJBOnBack');var checkVar=BBiFrame.src.substr(-11,11);if(bajb_backdetect.FrameLoaded==1&&checkVar!="HistoryLoad"){BBiFrame.src="#"}else{if(bajb_backdetect.FrameTry<2&&checkVar!="HistoryLoad"){bajb_backdetect.FrameTry++;bajb_backdetect.FrameTimeout=setTimeout("bajb_backdetect.SetupFrames();",700)}}},SafariHash:'false',Safari:function(){if(bajb_backdetect.SafariHash=='false'){if(window.location.hash=='#b'){bajb_backdetect.SafariHash='true'}else{window.location.hash='#b'}setTimeout("bajb_backdetect.Safari();",100)}else if(bajb_backdetect.SafariHash=='true'){if(window.location.hash==''){bajb_backdetect.SafariHash='back';bajb_backdetect.OnBack();history.back()}else{setTimeout("bajb_backdetect.Safari();",100)}}},Initialise:function(){if(bajb_backdetect.Browser.Safari){setTimeout("bajb_backdetect.Safari();",600)}else{document.write('<iframe src="blank.html" style="display:none;" id="BAJBOnBack" onunload="alert(\'de\')" onload="bajb_backdetect.BAJBFrame();"></iframe>')}}};bajb_backdetect.Initialise();
  bajb_backdetect.OnBack = function () {
    parent.sinvalidate=1;
    parent.document.IBS.action = VURL01;
    parent.document.IBS.submit();
  }
}