function escreve_flash(){

//1 a 4
var numero = parseInt((Math.random() * 4))+1; 
if(numero>4) numero=4;

x="swf/efeito"+numero;
document.write('<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="713" height="205" id="'+x+'" align="middle">');
document.write('<param name="allowScriptAccess" value="sameDomain" />');
document.write('<param name="movie" value="'+x+'.swf" /><param name="quality" value="high" />');
document.write('<param name="wmode" value="transparent" />');
document.write('<param name="bgcolor" value="#ffffff" />');
document.write('<embed src="'+x+'.swf" quality="high" wmode="transparent" bgcolor="#ffffff" width="713" height="205" name="'+x+'" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" />');
document.write('</object>');

}