小编vij*_*jay的帖子

if (window.XMLHttpRequest)
{
    xmlhttp=new XMLHttpRequest();
}
else
{
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.open("GET","t1.txt",false);
xmlhttp.send();
xmlDoc=xmlhttp.responseText;
xmlhttp.open("w","t1.txt");
xmlhttp.writeln('hai');
xmlhttp.close();
console.log(xmlDoc);