跪求窗口间参数传递问题,在线等

摸态窗口传值，脚本实现！
  function openWinCus()
    {
    var str =openDialog("select_customer.aspx",null,null,550,450);
    if(str)
    {
    document.all("C_CustomerID").value = str.CustomerID;
    }
    }select_customer.aspx：页面选择脚本
function selectvalue()
{
var obj = new Object();
    obj.CustomerID = “所选择客户”;
    window.returnValue = obj;
            window.close();

}
}
}