Java Development Tools

Hi
I need to open a new pop-up window using javascript .i dont want to use predefined adf function such as dialog, _target,usewindow (as per req) .but i can able to open pop-up window but still parent window is active (not disable ) i am clicking parent window when child is open .

what i did that:

1) i used given fn on cmd button onclick event

<script type="text/javascript">
var popupWindow=null;
function popup(){
popupWindow = window.open('http://10.14.1.1:9002/a/b/c/d/payment/Settlement.jsp','abcd12','height=600,width=600,top=0,left=0,resizable');
popupWindow.focus()
}

</script>

give me good suggestion to solve this issue