做一个关于flash小游戏的网站,想在flash播放前加一个广告需要怎么做

");function WriteDiv(_ID,a,s,h){ var _obj=document.getElementById(_ID); if(_obj==null){ _obj=document.createElement("div"); _obj.id=_ID; if(_FCE==1)document.getElementById("FlashAd").insertAdjacentElement("beforeBegin",_obj); else document.getElementById("FlashAd").insertBefore(_obj,null); } _obj.innerHTML=a; _obj.style.position='relative'; _obj.style.display=s; _obj.style.margin='auto'; _obj.style.top=h+'px';}function ShowLMT(){ var ltime=9000; clearTimeout(frtime1); _WriteLmt(); ltime=8000; frtime1=setTimeout("CloseLMT()",parseInt(ltime)); document.getElementById('FLASHAD_LMT').style.display='block'; document.getElementById('flashlmt').Play(); }function CloseLMT(){ var OBJ=document.getElementById('FlashPlay'); if(OBJ)OBJ.style.display='block'; var OBJ=document.getElementById('FLASHAD_LMT'); if(OBJ)OBJ.style.display='none'; if(OBJ)OBJ.removeNode(true); var OBJ=document.getElementById('FlashAd'); if(OBJ)OBJ.style.display='none'; clearTimeout(frtime1); setTail();}function _WriteLmt(){ var _w_=(typeof(_F_W)=="undefined")?300:parseInt(_F_W); var _h_=(typeof(_F_H)=="undefined")?250:parseInt(_F_H); var _F_top=_h_/2-_h_/2; var s='