On-Demand Javascript - Ajax Patterns

来源:百度文库 编辑:神马文学网 时间:2024/04/28 15:38:37
function ensureUploadScriptIsLoaded() {
if (self.uploadMessages) { // Already exists
return;
}
var head = document.getElementsByTagName("head")[0];
script = document.createElement(‘script‘);
script.id = ‘uploadScript‘;
script.type = ‘text/javascript‘;
script.src = "upload.js";
head.appendChild(script)
}