var isFlash = true; // just change it's value every time
if(isFlash){
document.write('<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=5,0,0,0" width="480" height="95">');
document.write('  <param name=movie value="http://ads.trendsmag.com/magazines/trendshouse/img/11.swf">');
document.write('  <param name=quality value=high>');
document.write('  <embed src="http://ads.trendsmag.com/magazines/trendshouse/img/11.swf" quality=high pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="480" height="85">');
document.write('  </embed></object>');
}
else {
document.write('<a href="http://ads.trendsmag.com/magazines/trendshome/?l=banner" target="_blank"><img src="http://ads.trendsmag.com/magazines/trendshome/?i=banner" width="468" height="60" border="0"></a>');
}