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You may be get some help from the code below.
<%
String str="str";
%>
<script>
function accessVar(){
var varStr='<%=str%>';
alert(varStr);// here will diplay 'str'
}
</script>
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this.Response.Write("<script language=javascript>window.close();");
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this.Response.Write("");
this.Response.Write("{top.opener =null;top.close();}");
this.Response.Write("");
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<span style="cursor:hand" onclick="reflush();return false; ......