globalEval

globalEval.js

// 摘自http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
function globalEval(data) {
    data = data.replace(/^\s*|\s*$/g, "");
    if (data) {
        var head = document.getElementsByTagName("head")[0] ||
                        document.documentElement,
                script = document.createElement("script");
        script.type = "text/javascript";
        script.text = data;
        head.appendChild(script);
        head.removeChild(script);
    }
}

window.onload = function() {
    (function() {
        globalEval("var test = 5;");
    })();
    assert(test === 5, "The code was evaluated globally.");
};