摘要： <12>消息的发送Js文件function sendMessage(friendEmail,chat,text){ var xmlhttp; if(window.XMLHttpRequest){//code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); if(xmlhttp.overrideMimeType){//设置MIME类别 xmlhttp.overrideMimeType("text/xml"); } } else{//code for IE6, IE5 x. 阅读全文