The scripts and field descriptions are below. 

I use this to store text values during the session, but it can apply to any field type. 

let result = setGlobal( globalName, value)  

let result = getGlobal(globalName)

The key is to bind storedGName at the server  and     bind storedGValue at the browser (local memory) in the table named GLOBAL. 

The values are stored in a table called Globals. 

#{//}#;
#{//}#;
#{//}#;
#{// *******************************************************}#;
#{// *****************  FUNCTION Set Global  ***********************}#;
#{// *******************************************************}#;
#{//}#;
function setGlobal(gName : text,gValue : text) do
    let xResult := "";
    let xFind := "";
    let xCnt := 0;
    let xGName := lower(gName);
    let xGValue := gValue;
    if gName = null then
        let xResult := "error - gName empty.";
        xResult
    else
        let xCnt := cnt(select globals where storedGName = xGName);
        if xCnt = 0 then
            #{// if null, then no record was found so create one and store the global name and value.*}#;
            let p := (create globals);
            p.(storedGName := xGName);
            p.(storedGValue := xGValue);
            #{// *alert("A xResult is null" + xResult + "<< (Null)");**}#;
            "ok -A"
        else
            #{// if not null, then a record was found so store the global value.*}#;
            let xFind := last(select globals where storedGName = xGName);
            xFind.(storedGValue := xGValue);
            #{// *alert("xResult**=" + xResult + "<<(not null)");**}#;
            "Ok -B"
        end
    end
end;
#{//}#;
#{//}#;
#{// *******************************************************}#;
#{// *****************   get Global  ***********************}#;
#{// *******************************************************}#;
function getGlobal(gName : text) do
    let xGName := lower(gName);
    let xResult := "";
    let xCnt := 0;
    if gName = null then
        xResult := "error - gName empty.";
        void
    else
        xResult := last(select globals where storedGName = xGName).storedGValue
    end;
    xResult
end;
#{//}#;
#{//}#;
#{//}#;