js根据顺序加载，有依赖关系

function loadScript(url, callback) {

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

script.type = "text/javascript";

script.src = url;

document.getElementById("srciptCode").appendChild(script);

script.onload = function() {

callback();

}

}

loadScript("../js/jquery-1.8.3.min.js",function(){

console.log("jquery-1.8.3.min.js ok")

loadScript("../js/jquery.qrcode.min.js",function(){

console.log("jquery.qrcode.min.js ok")

loadScript("../js/ui.min.js?0107",function(){

console.log("ui.min.js ok")

loadScript("../js/activity/code.min.js?0107",function(){

console.log("code.min.js ok")

})

})

})

})