console 命令行工具 X clear

console

function changeAction()
{
var x=document.getElementById("myForm")
alert("Original action: " + x.action)
x.action="/htmldom/index.asp"
alert("New action: " + x.action)
x.submit()
}

<form id="myForm" action="/i/eg_smile.gif">
   名称：
  <input type="text" value="米老鼠"> 
  <input type="button" onclick="changeAction()" value="改变 action 属性并提交表单"> 
 </form>