SELECT-ALL (numeric)

Set SELECT-ALL=1 to cause the entire contents of the HTML page, current frame, or entry field to be selected. What gets selected depends on which element of the Web page has the keyboard focus. If you click in an HTML form entry field, SELECT-ALL=1 selects the value of that entry field only. If you click in an area of a frame outside of a form, SELECT-ALL=1 selects the entire frame. This behavior was designed by Microsoft and cannot be changed.