jquery Ajax Modify the global variable sample code _jquery

There was a problem at work today.
The code is as follows:

Copy Code code as follows:

var Status=1;
var ob=$ ("[name= ' email ']");
$.ajax ({
URL: "{: U (' Home/index/checkemail ')}",
Data: "Email=" +query.email,
Type: "Post",
DataType: "JSON",
Success:function (re) {
status=0;
}
});
alert (status);

So every time the bounce out is 1;
Because I want to change the status by the value of the return, I checked the data.
Solution: Async:false,
Rewrite as:

Copy Code code as follows:

$.ajax ({
Async:false,
URL: "{: U (' Home/index/checkemail ')}",
Data: "Email=" +query.email,
Type: "Post",
DataType: "JSON",
Success:function (re) {
status=0;
}
});