就是bordercolor呀,如:bordercolor="background"<HTML>
<HEAD>
<TITLE>欢迎</TITLE>
</HEAD>
<FRAMESET name="fstMain" cols="216,*" border="5" frameborder="1" FRAMESPACING="10" TOPMARGIN="0" LEFTMARGIN="0" MARGINHEIGHT="0" MARGINWIDTH="0" >
<FRAME name="fraLeftFrame" src="about:bb" TOPMARGIN="0" LEFTMARGIN="0" MARGINHEIGHT="0" MARGINWIDTH="0" FRAMESPACING="0" FRAMEBORDER="0" BORDER="0"></FRAME>
<FRAME name="fraRightFrame" src="about:aa" FRAMEBORDER="no" bordercolor="background"></FRAME>
</FRAMESET>
</HTML>
<HEAD>
<TITLE>欢迎</TITLE>
</HEAD>
<FRAMESET name="fstMain" cols="216,*" border="5" frameborder="1" FRAMESPACING="10" TOPMARGIN="0" LEFTMARGIN="0" MARGINHEIGHT="0" MARGINWIDTH="0" >
<FRAME name="fraLeftFrame" src="about:bb" TOPMARGIN="0" LEFTMARGIN="0" MARGINHEIGHT="0" MARGINWIDTH="0" FRAMESPACING="0" FRAMEBORDER="0" BORDER="0"></FRAME>
<FRAME name="fraRightFrame" src="about:aa" FRAMEBORDER="no" bordercolor="background"></FRAME>
</FRAMESET>
</HTML>
<frame name="mainFrame" src="1.htm" bordercolor="#000000" frameborder="YES">
<frame name="rightFrame" scrolling="NO" src="12.htm" bordercolor="#000000" frameborder="YES">
</frameset>