Window.open is getting blocked by the pop up blocker

hi,

I am using the following code to pop a window.  Now this pop up is getting blocked by the pop up blocker both in IE and firefox.

the onclick event doesn't blocks the pop up but the onkeydown event does.

Nother issue is sometimes the focus stays on the pop up window and sometimes not and the pop up window gets minimized.

Thanks,

<input type="text" name="question" id ="question" value="question" onfocus="this.value=' ';" onkeydown="if (event.keyCode == 13) showpopup();" /> 
<input type="image" name="AskButton" id="AskButton" src="qst.jpg" onclick = "showpopup();"  /></td></tr>
 <script language = "javascript:>
function showspopup(Obj)
{
 
 window.open('http://abcd-test.com','', 'width=825,height=625,toolbar=No,location=No,scrollbars=Yes,status=Yes,resizable=Yes,left=100');
 window.focus();
 return false;
  }
</script>

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