动态加载js

动态加载js

 

function loadJs(jssrc, callback) {
        if (jssrc) {
            var head = document.getElementsByTagName('head')[0];
            var script = document.createElement('script');
            if (script.readyState) { //IE
                script.onreadystatechange = function () {
                    if (script.readyState == "loaded" || script.readyState == "complete") {
                        script.onreadystatechange = null;
                        if (callback && typeof callback == 'function') {
                            callback();
                        }
                    }
                };
            } else { //Others
                script.onload = function () {
                    if (callback && typeof callback == 'function') {
                        callback();
                    }
                }
            }
            script.src = jssrc;
            head.appendChild(script);
        }
    }