페이지를 불러올 때 발걸음을 동적으로 추가합니다

// ， 

function loadScript(url) {// 

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

    script.type = "text/javascript";

    script.src = url;



    document.body.appendChild(script);

}



function loadScriptString(code) {// 

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

    script.type = "text/javascript";

    try {

        script.appendChild(document.createTextNode(code));

    } catch (ex) {

        script.text = code;

    }



    document.body.appendChild(script);

}