// nocontextmenu File
function nocontextmenu() 
{
    return false;
} 
function clickIE()         
{
    if (document.all)
    {
        return false;
    }
}
 
function clickNS(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=clickNS;
}
else
{
    document.onmouseup=clickNS;
    document.oncontextmenu=clickIE;
}
document.oncontextmenu = nocontextmenu;
function blockError()
{
    return true;
}
window.onerror = blockError;