converting to javascript

Could anyone convert the following VB codes to Javascript
Thanks

VB Code:

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
If KeyCode = vbKeySpace Then
    x = roket.UBound + 1
        Load roket(x)
            roket(x).Visible = True
    
End If
 
End Sub
Private Sub Form_Load()
Timer1.Enabled = True
End Sub
Private Sub Timer1_Timer()
  Dim y As Integer
For y = 1 To x
roket(y).Left = roket(y).Left + 10
Next
End Sub