请教 一下，我要实现下面的功能怎么写脚本,急急
我页面上是个框加
<frameset   rows= "81,* "   cols= "* "   frameborder= "no "   border= "0 "   framespacing= "0 ">
    <frame   src= "Top.aspx "   name= "topFrame "   scrolling= "No "   noresize= "noresize "   id= "topFrame "     />
    <frameset   cols= "149,* "   frameborder= "no "   border= "0 "   framespacing= "0 "   id= "Left ">
        <frame   src= "Left.aspx "   name= "leftFrame "   scrolling= "No "   noresize= "noresize "   id= "leftFrame "     />
                <frame   src= "Start.aspx "   name= "mainFrame "   id= "mainFrame "     />
    </frameset>
</frameset>
<noframes>
</noframes>
我现在在top.asps里面，按点一个按钮，我要得到left.aspx页面一个图片的src，怎么写脚本

------解决方案--------------------
window.parent.frames( "框架名 ").document.getElementById( "图片id ").src=