Cross-domain data transmission (JSONP) based on Jquery_jquery

Backend:

Copy code The code is as follows:

$json_str = json_encode(array("ddd"=>"11111111"));
echo $_GET['ja'].'('.$json_str.')';
?>

Front-end:

Copy code The code is as follows:

$.getJSON(' http://www.liushan.cn/test.php?ja=?',function (json){
alert(json);
});

Pure JS implementation (JSONP):

Copy code The code is as follows:

//server return aa({' ddd':'ddd'}) callback function name: $_GET['callback']
//author:lonely
(function(w){
function getjson(){}
getjson. prototype.set=function(url,callback,callbackname){
this.callfn=callbackname||'urlcallback';
this.url=url "?callback=" this.callfn;
try{
eval(this.callfn "=function(data){n"
"callback(data);n"
'delete ' this.callfn ';}');
}catch(e) {return;}
this.request();
delete this.url;
}
getjson.prototype.request=function(){
var script=document.createElement("script ");
script.src=this.url;
var load=false;
script.onload = script.onreadystatechange = function() {
if(this.readyState === "loaded " || this.readyState === "complete"){
load=true;
script.onload = script.onreadystatechange=null;
}
};
var head=document .getElementsByTagName("head")[0];
head.insertBefore(script,head.firstChild);
}
w.getjson=getjson;
})(window)
/ /Use DOME
new getjson().set("http://www.test.cn/test.php",function(data){
alert(data.ddd);
});

Another: getScript

Copy code The code is as follows:

jQuery.getScript("http://dev.jquery.com/view/trunk/plugins/color/jquery.color.js", function(){
$("#go").click(function( ){
$(".block").animate( { backgroundColor: 'pink' }, 1000)
.animate( { backgroundColor: 'blue' }, 1000);
});
});//CHM help file example