JS JSONP function package

转载自 https://my.oschina.net/shuaihong/blog/1542554

= myJsonp function (URL, Data, the callback) { 
            
    var fnName = 'myJsonp_' + Math.random () toString () Replace.. (, '' '.' ); 
    
    // define a global callback 
    window [fnName] = the callback; 
    
    // initialization sequence parameter 
    var QueryString = '' ; 

    for ( var attr in Data) { 

        QueryString + + attr = '=' + Data [attr] + '&' ; 

    } 
    // dynamically created script tag 
    var script = document.createElement ( 'Script' ); 
    
    // backstage to accept the callback, and call 
    '?' script.src = url + + querystring + 'callback ='+ fnName;
    
    //When processing is complete, remove the script tag, repeated requests otherwise, there will be a plurality of page script tag 
    script.onload = function () {     

        document.body.removeChild (script); 

    } 
    
    document.body.appendChild (script); 
}