1 function loadScript(url, callback) {
2 var script = document.createElement("script"
);
3 script.type = "text/javascript"
;
4
5 if (script.readyState) {
//IE
6 script.onreadystatechange =
function() {
7 if (script.readyState == "loaded" || script.readyState == "complete"
) {
8 script.onreadystatechange =
null;
9 callback();
10 }
11 };
12 }
else {
13 script.onload =
function() {
//其他浏览器
14 callback();
15 };
16 }
17 script.src =
url;
18 document.getElementsByTagName("head")[0
].appendChild(script);
19 }
用法如下：
1 loadScript("file1.js",
function() {
2 console.log("File is loaded!"
);
3 });
4 loadScript("file1.js",
function() {
5 loadScript("file2.js",
function() {
6 loadScript("file3.js",
function() {
7 console.log("All files are loaded!"
);
8 });
9 });
10 });
转载于:https://www.cnblogs.com/qzsonline/archive/2012/06/19/2554920.html
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