request(jssyncreq.jsp):
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script>
function JSONscriptRequest(fullUrl) {
this.fullUrl = fullUrl;
this.noCacheIE = '&noCacheIE=' + (new Date()).getTime();
this.headLoc = document.getElementsByTagName("head").item(0);
this.scriptId = 'JscriptId' + JSONscriptRequest.scriptCounter++;
}
JSONscriptRequest.scriptCounter = 1;
JSONscriptRequest.prototype.buildScriptTag = function () {
this.scriptObj = document.createElement("script");
this.scriptObj.setAttribute("type", "text/javascript");
this.scriptObj.setAttribute("charset", "gbk");
this.scriptObj.setAttribute("src", this.fullUrl + this.noCacheIE);
this.scriptObj.setAttribute("id", this.scriptId);
}
JSONscriptRequest.prototype.removeScriptTag = function () {
this.headLoc.removeChild(this.scriptObj);
}
JSONscriptRequest.prototype.addScriptTag = function () {
this.headLoc.appendChild(this.scriptObj);
}
function deal(obj) {
alert(Blog.info);
}
function test() {
var req = "jssyncres.jsp?callback=deal";
bObj = new JSONscriptRequest(req);
bObj.buildScriptTag();
bObj.addScriptTag();
}
</script>
</head>
<body onload=''>
<button onclick='test()'>test</button>
</body>
</html>
=========================================================================
response(jssyncres.jsp):
<%
String s1 = request.getParameter("callback");
response.getWriter().print("var Blog = {};Blog.info='test';"+s1+"()");
%>
動態script標籤解決跨域問題實例
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