var message="This function is not allowed.";
 
//window.history.forward(1);
document.oncontextmenu = function(){return false}

if (navigator.appName == "Netscape")
{
   document.onkeypress = function(e) {
   	var c = document.layers ? e.which : document.all ? event.keyCode : e.keyCode;		
   	if (c == 116) {
		alert(message);
		return false;
	}
   }
}
else {
	document.onkeydown = function(){
		if(window.event && window.event.keyCode == 116) 
        	{ 
			window.event.keyCode = 505;
  		}

		if(window.event && window.event.keyCode == 505) {
			alert(message);
			return false; 
		}
	}
}

var s = navigator.appVersion; 
var len = s.length; 
var t = s.substring (0, 3); 
var ver = parseFloat(t); 
function click1(e)
{
	if (document.all)
	{
		if (event.button == 2)
		{ 
			alert(message); 
			return false; 
		} 
	} 
	if (document.layers) 
	{ 
		if (e.which == 3 || e.which == 2) 
		{ 
			alert(message); submitForm = "no"; 
 			return false; 
		} 
	} 
}

function click2(e) 
{ 
	if (e.which == 3 || e.which == 2) 
	{ 
		alert(message); 
		return false; 
	} 
}

if ( (navigator.appName == "Netscape") && (ver >=5)) 
	document.onmouseup=click2; 
else 
	document.onmousedown=click1;


if (navigator.appName == "Netscape")
{
    window.onfocus = function()
    {
        if (document.inputForm)
        {
            for (var i = 0; i < document.inputForm.length; i++)
            {
                document.inputForm[i].onkeypress = function(e)
                {
                    var c = document.layers ? e.which : document.all ? event.keyCode : e.keyCode;		
                    if (document.inputForm[i].type != "textarea" && (c == 13 || c == 3)) return false;
                };
            }
        }
        window.onfocus = null;
    };
}
else
{
    document.onkeypress = function(e)
    {
        var c = document.layers ? e.which : document.all ? event.keyCode : e.keyCode;
        if ((document.activeElement.type == "text" || document.activeElement.type == "password") && (c == 13 || c == 3)) return false;
    };
}