Ajax 异步传输应用
??最近在工作中接触了异步传输，现在总结一下。
之前用的比较多的，也是比较普遍的是js最基本的调用
function verify(){var userName = document.getElementById("userName").value; function handleSuccess(o){ var userName= trim(o.responseText); document.write(userName); }function handleFailure(){alert("系统错误，请稍后再试！");return; }var getNameCallback = { success: handleSuccess, failure: handleFailure, cache:false};var url = "{调用地址}"; var userName= "userName="+userName;var request = YAHOO.util.Connect.asyncRequest('POST', url, getNameCallback , postData);}?