This is to disable them
Taken from here, then I modified
http://www.sitepoint.com/forums/javascript-15/disable-back-javascript-168890.html
These is javascript coding
//DISABLE "GO BACK TO PREVIOUS HISTORY" IF PRESSING "BACKSPACE"
if (typeof window.event != 'undefined')
document.onkeydown = function()
{
if( event.keyCode == 8){
theEvent = event.srcElement.tagName.toUpperCase();
if( theEvent == 'HTML'){
return false;
}
else if( theEvent == 'INPUT'){
theType = event.srcElement.getAttribute('type').toUpperCase();
//alert(theType);
switch(theType){
case 'TEXT':
return true;
break;
default:
return false;
}
return false;
}
else{
switch( theEvent){
case 'TEXTAREA':
return true;
break;
default:
//alert('Backspace pressed on ' + theEvent + ', return false');
return false;
}
return false;
}
}
}
else
document.onkeypress = function(e)
{
if( e.keyCode == 8){
theEvent = e.target.nodeName.toUpperCase();
if( theEvent == 'HTML'){
return false;
}
else if( theEvent == 'INPUT'){
theType = e.target.getAttribute('type').toUpperCase();
//alert(theType);
switch(theType){
case 'TEXT':
return true;
break;
default:
return false;
}
return false;
}
else{
switch( theEvent){
case 'TEXTAREA':
return true;
break;
default:
//alert('Backspace pressed on ' + theEvent + ', return false');
return false;
}
return false;
}
}
}
