javascript - window.open() is not Working when Passing variable in JSP -

i getting stuck on project last 2 days. using window.open() in jsp button type input. as:-

html

     <td colspan="2" align="right"><input type="button" value="report" id="btn1"       onclick="window.open('<%= url %>')"></td>

but when pass string @ place of url in window.open works fine.

javascript:

    onclick="window.open('<%= "http://www.google.com" %>')"

please me, in advance

there no problem code. hope have initialized url before . may variable url empty.

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