window.opener.document.中含有变量,如何运行

window.opener.document..中含有变量,怎么运行
window.opener.document..中含有变量,如何运行该语句

<script   language= "javascript "   type= "text/javascript ">
    function   nodeSelect(ReturnTextControl)
    {                
            var   ss= "window.opener.document. "   +   ReturnTextControl   + ".value=100 ";
            //如何运行SS变量中命令?
      }
</script>

------解决方案--------------------
eval(ss);