var objtag = "";

objtag = '<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" ';
objtag += 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="350" height="415">';
objtag += '<param name="movie" value="/image/mainflash.swf">';
objtag += '<param name="wmode" value="transparent">';
objtag += '<param name="quality" value="high">';
objtag += '<embed src="/image/mainflash.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" ';
objtag += 'type="application/x-shockwave-flash" width="350" height="415"></embed>';
objtag += '</object>'; 

document.write(objtag);