Jquery's principles and examples of ajax cross domain requests

Client-side JQuery. Ajax call code example:

$.ajax({ 
type : "get", 
async:false, 
url : "http://www.xxx.com/ajax.do", 
dataType : "jsonp", 
jsonp: "callbackparam",//The server is used to receive the parameter of the function name of the callback call
jsonpCallback:"success_jsonpCallback",//The function name of the callback
success : function(json){ 
alert(json); 
alert(json[0].name); 
}, 
error:function(){ 
alert('fail'); 
} 
});

Sample code for the server to return data:

public void ProcessRequest (HttpContext context) { 
context.Response.ContentType = "text/plain"; 
String callbackFunName = context.Request["callbackparam"]; 
context.Response.Write(callbackFunName + "([ { name:"John"}])"); 
}