string s="newliuyan.aspx?hy="+hy+"&user="+Session["user"].ToString ();
Response.Write("<script language=javascript>window.open('"+s+"','_blank','left=250,top=200,width=300,height=320');</script>");
Response.Write("<script language=javascript>window.open('"+s+"','_blank','left=250,top=200,width=300,height=320');</script>");
你点击以后看看网页的html代码开头是不是有
<script language='javascript'>window.open('newliuyan.aspx?....','_blank','left=250,top=200,width=300,height=320');</script>");</script>
Response.Write("<script language=javascript>window.open('"+s+"','_blank','left=250,top=200,width=300,height=320');<"+"/script>");