function noBack(){window.history.forward();}
noBack();
window.onload=noBack;
window.onpageshow=function(evt){if(evt.persisted)noBack();}
window.onunload=function(){void(0);}


if (window.Event)
document.captureEvents(Event.MOUSEUP);

//To disable context menu
function nocontextmenu()
{
event.cancelBubble = true
event.returnValue = false;
return false;
}

//To disable right click
function norightclick(e)
{
if (window.Event)
{
if (e.which !=1)
return false;
}
else
if (event.button !=1)
{
event.cancelBubble = true
event.returnValue = false;
return false;
}
}

//To disable F5 and Backspace button
function nokeydown()
{
if ((event.keyCode == 8) || (event.keyCode == 116)) //backspace=8 and F5=116
{
event.keyCode = 0;
event.returnValue = false;
}
}
document.oncontextmenu = nocontextmenu;
document.onmousedown = norightclick;
document.onkeydown = nokeydown;