I Have Error to open Second Html Page as popup window in first html page?

Question

The following syntax I wrote

<input id="Button1" type="button" value="Scan" language="javascript" onclick="return Button1_onclick()" /></td>

<script language="javascript" type="text/javascript">

function Button1_onclick() 
{ 
     window.open("win1.html","Window1",
     "menubar=no,width=430,height=360,toolbar=no");


} 

</script