加个div试下

    objFiles.innerHTML="<object classid='clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA' width="+document.RmForm.width.value+" height="+document.RmForm.height.value+"><param name='CONTROLS' value='ImageWindow'><param name='CONSOLE' value='Clip1'><param name='AUTOSTART' value='-1'><param name=src value="+document.RmForm.url.value+"></object><br><object classid='clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA'  width="+document.RmForm.width.value+" height=60><param name='CONTROLS' value='ControlPanel,StatusBar'><param name='CONSOLE' value='Clip1'></object>"

改成

    objFiles.innerHTML="<div><object classid='clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA' width="+document.RmForm.width.value+" height="+document.RmForm.height.value+"><param name='CONTROLS' value='ImageWindow'><param name='CONSOLE' value='Clip1'><param name='AUTOSTART' value='-1'><param name=src value="+document.RmForm.url.value+"></object><br><object classid='clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA'  width="+document.RmForm.width.value+" height=60><param name='CONTROLS' value='ControlPanel,StatusBar'><param name='CONSOLE' value='Clip1'></object></div>"

有可能是你前台的CSS控制引起的