asp.net经典框架设计，带显示隐藏左部页面按钮.
<SCRIPT>
function switchSysBar(){
if (switchPoint.innerText==3) { switchPoint.innerText=4 document.all("frmTitle").style.display="none"
} else { switchPoint.innerText=3 document.all("frmTitle").style.display="" }
}
</SCRIPT><BODY scroll=no ><table height="100%" cellspacing=0 cellpadding=0 width="100%" border=0> <tr><td height="80" colspan="3"><iframe style="Z-INDEX: 2; VISIBILITY: inherit; WIDTH: 100%; HEIGHT: 80px " name=topfram src="Top.asp" frameborder=0></iframe></td></tr> <tbody> <tr> <td id="frmTitle" valign=center noWrap align=middle><iframe style="Z-INDEX: 2; VISIBILITY: inherit; WIDTH: 205px; HEIGHT: 100%" name=leftfram src="Left.asp" frameborder=0></iframe></td> <td bgcolor=#0095f9> <table height="100%" cellspacing=0 cellpadding=0 border=0> <tbody><tr bgcolor=#5F778B><td style="HEIGHT: 45%"></td></tr> <tr id="lbar" bgcolor=#BCCAD7> <td style="HEIGHT: 48" onClick=switchSysBar() onMouseOver="lbar.style.background='#F2F2F2';lbar.style.color='#000000'" onMouseOut="lbar.style.background='#BCCAD7';lbar.style.color='#FFFFFF'"><font style="FONT-SIZE: 8px; CURSOR: hand; FONT-FAMILY: Webdings"><span id=switchPoint>3</span></font></td> </tr><tr bgcolor=#5F778B><td style="HEIGHT: 45%"></td></tr> </tbody> </table> </td> <td style="WIDTH: 100%"><iframe id=main style="Z-INDEX: 1; VISIBILITY: inherit; WIDTH: 100%; HEIGHT: 100%" name=mainfram src="Main.asp" frameborder=0 scrolling=yes></iframe></td> </tr> </tbody></table>