function closeFla(){
 if(document.getElementById) {//NN6,Mozilla,IE5騾包ｽｨ
  document.getElementById("flaLayer").style.visibility = 'hidden';
 }else if(document.all){       //IE4騾包ｽｨ
  document.all("flaLayer").style.visibility = 'hidden';
 }else if(document.layers) {   //NN4騾包ｽｨ
  document.layers["flaLayer"].visibility = 'hide';
 }
}

function docWrite(){
<!--参照元SWF-->
 var swf = "http://aroom.0ness.net/parts/swf/company.swf";
<!--/参照元SWF-->

 var html="";


 html+='<div id="flaLayer" style="visibility:visible;">';
 html+='<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://fpdownload.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0" width="160" height="222" id="switch_bomb" align="middle">';
 html+='<param name="allowScriptAccess" value="always" />';
 html+='<param name="movie" value="'+swf+'" />';
 html+='<param name="quality" value="high" />';
 html+='<param name="wmode" value="transparent">';
 html+='<param name="bgcolor" value="#333333" />';
 html+='<embed src="'+swf+'" quality="high" bgcolor="#333333" width="160" height="222" name="switch_bomb" align="middle" wmode="transparent" allowScriptAccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />';
 html+='</object>';
 html+='</div>';
 document.write(html);
}
docWrite();