How to get the Key mode

Question

Hello
Let me ask a question about key mode.
I'm trying to catch the timing when both Shift-Key and Esc-Key are pressed.
Using the Edge Animate's document.keydown  events , I can get the chance when the Shift-Key is pressed.
At the same time I need to know the Esc-Key's mode , pressed? or released?.
Does anyone know how to get the Ket mode?
regards

Answer 1

Thank you very much heathrowe.
hmm, It seems to be the same thing.
If users release [Esc-key] first and [Shift-key] next, this script works.
But it doesn't work in the contrary case.
To cover both cases, the system have to grasp the STATE of the keys, not EVENT.
I've made an example below .....
This script can hold the state of the keys.
[Note 1] This time I used [Esc-Key] and [z-key] ,  because the task manager opens
             when [Shift-Key] and [Esc-key] is pressed in case of Chrome.
[Note 2] I used text-box named "Result" as an output tool instead of the alert tool,
             because the variables (KeyFlagShift / KeyFlagZ) freeze using an alert tool
            for some unknown reason.
// ******  compositionReady  ******
sym.setVariable("KeyFlagShift" , false);
sym.setVariable("KeyFlagZ" , false);
// ******  KeyUp  ******
switch(e.which){
          case 16:
                              sym.getComposition().getStage().setVariable("KeyFlagShift" , false);
                              break;
          case 90:
                              sym.getComposition().getStage().setVariable("KeyFlagZ" , false);
                              break;
// ******  KeyDown  ******
switch(e.which){
          case 16:
                              sym.getComposition().getStage().setVariable("KeyFlagShift" , true);
                              break;
          case 90:
                              sym.getComposition().getStage().setVariable("KeyFlagZ" , true);
                              break;
var KeyS = sym.getComposition().getStage().getVariable("KeyFlagShift");
var KeyZ = sym.getComposition().getStage().getVariable("KeyFlagZ");
if(KeyS == true && KeyZ == true){
          sym.getComposition().getStage().$("Result").text(" Shift + Esc was pressed");
}else{
          sym.getComposition().getStage().$("Result").text(" -------");