在ajax的success中给变量赋值为空问题解决办法

<script type="text/javascript">

var global;

function ajax_assign(){

$.ajax(

url:xxx,

data:{'xx.xx':xx},

type:'post',

dataType:'json',

async : false,

success:function(data){

global = data;

}

);

alert(global);

}

</script>