ajax $.post同步和异步方法

    //ajax异步post 0
    //$.post("ajaxjsonp.php?sts=cEid&v="+eleNo,function(data){document.getElementById(var1 + "_id").value = data;},"text");
    //ajax同步post 1
    $.ajaxSettings.async = false; 
    var datastr;
    $.post("ajaxjsonp.php?sts=cEid&v="+eleNo,function(data){datastr=data;},"text");
    document.getElementById(var1 + "_id").value = datastr;
    $.ajaxSettings.async = true;
    //ajax同步post 2
    //$.ajax({url: "ajaxjsonp.php?sts=cEid&v="+eleNo,async:false,success:function(data){datastr=data;},dataType:"text"});