Problems with custom added INPUT element in dashlet header

I create a custom dashlet with an INPUT box for a filter on the records. Everything works fine when the INPUT box is put below the header DIV. When it is placed in the header DIV, the INPUT box does not accept a left click/focus. It I right click in it, the i-beam cursor appears and I can then input text.

My guess is this has something to do with the drag property of the dashlet. Does anyone have an idea of how to have the INPUT box behave “normally” and accept a left-click of the mouse to receive focus when it is in the dashlet header DIV?