How to open a Model Dialog in Javascript

To open a ModelDialog window with no toolbar or any theing.
just give your Url of the page to 'url' and to pass any value to that page means
give the value in 'sendValues'.
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var list =window.showModalDialog(url,sendValues,"toolbar=0;titlebar=0;status=0;dialogHeight=250px;
menubar=0;scrollbars=1;resizable=0;width=400;
left=150;top=100;titlebar=no");
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this will open a model dialog.
to make the model to postback inside that same window. give the code

base target="_self" inside the head tag of the html. this will make the window to postback inside itself or else. while postback, it will open a new window.

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