简单弄个getJson()

有时不得加载jq, 记录一下简单常用的函数

 var getJSON = (function(){
        var loadJsFile = function(file){
            var head = ghead();
            var e = document.createElement("script");
            e.type="text/javascript";
            e.src=file;
            head.appendChild(e);
        };

        var ghead = function(){
            var head, o = document;
            ((head = o.getElementsByTagName('head')[0]) || (head = o.body.parentNode.appendChild(o.createElement("head"))));
            return head;
        }

        return function(url, callback) {
            var tmpCallback = 'JCallback' + Math.ceil(Math.random() * 1000000);
            window[tmpCallback] = function(data){
                callback(data);
            };
            url = url + "&callback=" + tmpCallback ;
            loadJsFile(url);
        }
    })();

var getJSON = (function(){

var loadJsFile = function(file){

var head = ghead();

var e = document.createElement("script");

e.type="text/javascript";

e.src=file;

head.appendChild(e);

};

var ghead = function(){

var head, o = document;

((head = o.getElementsByTagName('head')[0]) || (head = o.body.parentNode.appendChild(o.createElement("head"))));

return head;

}

return function(url, callback) {

var tmpCallback = 'JCallback' + Math.ceil(Math.random() * 1000000);

window[tmpCallback] = function(data){

callback(data);

};

url = url + "&callback=" + tmpCallback ;

loadJsFile(url);

}

})();

没有同相同url地址判断

知识点滴

专注于php应用开发

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