Problem with access to control properties in Multibox

I used multibox-component to create lightbox-similar div. But I faced prob开发者_StackOverflow中文版lem. I placed textbox with id ‘tbx_position’ in that div. I entered some symbols in textbox and then tried to read value via javascript-function (it had to alert document.getElementById(‘tbx_position’).value). Every time that value was empty.

There is example of it.

Furthermore, if I place in the div asp:Button, server OnClick-eventhandler doesn’t catch fire. Is any idea, what’s reason? Thanks.

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Try adding the <form> & </form> tags to your page.