target:
指定公开赛， action URL。
关键点:
demo:让target指向隐藏的iframe
form.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript"> function doSave(){ var param = "?method=add"; testForm.action='handler.jsp' + param ; testForm.submit(); } </script> </head> <body> <form id="testForm" name="testForm" method="post" target="sub_frame"> id:<input type="text" name="id"><input type="button" value="提交" onclick="doSave();"> <iframe id="sub_frame" name="sub_frame" height="0" width="0" frameborder="0" marginheight="0" marginwidth="0" ></iframe> </form> <br/>id值: <input id="content" name="content" type="text"> </body> </html>
handler.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <% String method=request.getParameter("method"); if("add".equals(method)){ String id =request.getParameter("id"); out.println("<script type='text/javascript'>"); out.println("parent.document.getElementById('content').value='"+id+"';"); out.println("</script>"); } %>