function DisableSelect() {
return false;
}

function DisableSelectAll(e) {
if (navigator.systemLanguage) {
void(0);
}
else if (String.fromCharCode(e.which) == "a"|String.fromCharCode(e.which) == "A") {
return false;
}
else {
return true;
}
}

document.onkeypress=DisableSelectAll;
document.onselectstart=DisableSelect;
document.onmousedown=DisableSelect;