function abre(arquivo,alvo){ var xmlHttp; try{ xmlHttp=new XMLHttpRequest(); }
catch (e){ try { xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); } catch (e){ try { xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); }
catch (e){ alert("Seu navegador não suporta AJAX. Atualize-o em www.getfirefox.com"); return false; } } }
xmlHttp.onreadystatechange=function() { if(xmlHttp.readyState == 1) { document.getElementById(alvo).innerHTML = "<img src='images/loading.gif' align='absmiddle'>"; }
if(xmlHttp.readyState == 4) { document.getElementById(alvo).innerHTML = xmlHttp.responseText; } }
xmlHttp.open("GET",arquivo,true); xmlHttp.send(null); }