如何动态控制frame框架

[vbvcvf]

我的框架结构如下:
<frameset rows="13%,*" onload="InitSync(); ">
<frame src="head1.html" name="top" frameborder="1">
<FRAMESET border="1" frameSpacing="0" onload="InitSync(); " COlS="13%,*">
<frame name="left" src="menufrm1.aspx">
<frame name="right" src="truck.aspx">
</FRAMESET>
</frameset>


现在我想在"head1.html"加个"button"用来控制menufrm1.aspx的显示，请问如何才能做到????

[cloud_scorpion]

<SCRIPT>
document.all.ifram.height=10;
//ifram控件(即为frame框架)的高度为10。
</SCRIPT>

[gOODiDEA]

<script language="JavaScript">
function menuexpend()
{
main_frm.cols="140,15,*";
}

function menuclose()
{
main_frm.cols="0,15,*";
}
document.onkeydown=look;
</script>
<a href="#" onClick="top.menuclose()"><img src="images/close_nav.gif" width="15" height="13" border="0"></a>
<a href="#" onClick="top.menuexpend()"><img src="images/open_nav.gif" width="15" height="13" border="0"></a>

[flyfish51f]

frameset rows="13%,*" onload="InitSync(); ">
<frame src="head1.html" name="top" frameborder="1">
<FRAMESET border="1" frameSpacing="0" onload="InitSync(); " COlS="13%,*" id=frameChange>
<frame name="left" src="menufrm1.aspx">
<frame name="right" src="truck.aspx">
</FRAMESET>
</frameset>

head1.html
<script language="JavaScript">
function Change()
{
top.frameChange.cols="1,*";

}
</script>
<a href="#" onclick="Change()">改变大小　</a>