Use userdata for Javascript

Function inituserdata ()
{
If (testie () document.doc umentelement. addbehavior ("# default # userdata ");
}
Function testie ()
{
Return !! Document. All;
}
Function setuserdata (Key, value ){
VaR ex;
If (testie () {// IE
With(document.doc umentelement)
Try {
Load (key );
VaR otimenow = new date ();
Otimenow. setminutes (otimenow. getminutes () + 1440 );
Expires = otimenow. toutcstring ();
Setattribute ("value", value );
// Expires = new date ()-(-86400000). toutcstring ();
// Expires = new date ()-(-86400000). togmtstring ();
Save (key );
Return getattribute ("value ");
} Catch (Ex ){
Return;
}
} Else if (window. sessionstorage) {// FF 2.0 +
Try {
Sessionstorage. setitem (Key, value)
} Catch (Ex ){
Return;
}
} Else {
Return;
// Alert ("error occured in user data saving. Your browser do not support user data .");
}
}
 
Function getuserdata (key ){
VaR ex;
If (testie () {// IE
With(document.doc umentelement)
Try {
Load (key );
Return getattribute ("value ");
} Catch (Ex ){
Return;
}
} Else if (window. sessionstorage) {// FF 2.0 +
Try {
Return sessionstorage. getitem (key );
} Catch (Ex ){
Return;
}
} Else {
Return;
// Alert ("error occured in user data loading. Your browser do not support user data .")
}
}
Function deluserdata (key ){
VaR ex;
If (testie () {// IE
With(document.doc umentelement)
Try {
Load (key );
Removeattribute ("value ");
// Expires = new date (315532799000). toutcstring ();
// Expires = new date ()-86400000). togmtstring ();
Save (key );
} Catch (Ex ){
Return;
}
} Else if (window. sessionstorage) {// FF 2.0 +
Try {
Sessionstorage. removeitem (key );
} Catch (Ex ){
Return;
}
} Else {
Return;
// Alert ("error occured in user data deleting. Your browser do not support user data .")
}
}