菜鸟问题：怎么让网页自动隔一秒刷新，并且执行相应的动作？？？
下面是当点击一个按钮的时候让左边的textarea自动到右边的textarea
点击另外一个时候执行相反的动作

        <form   action= "editpage.jsp "   method= "post "   name= "form1 ">
       
        <textarea   rows= "15 "   cols= "33 "   name= "textedit "   wrap= "hard "> </textarea>
       
        <input   type= "button "   name= "button "   value= "从左到右 "   title= "submit "   onclick= "mk_confirm() ">
<input   type= "button "   name= "button1 "   value= "从右到左 "   title= "submit "   onclick= "mk_confirm1() ">
     
        <textarea   rows= "15 "   cols= "33 "   wrap= "hard "   name= "textedit2 "> </textarea>
        </form>
<script>      
    function     mk_confirm()      
    {      
var   textedit   =   document.getElementById( "textedit ").value;
var   textedit2=   document.getElementById( "textedit2 ");
textedit2.value   =   textedit;
}
    function     mk_confirm1()      
    {      
var   textedit2   =   document.getElementById( "textedit2 ").value;
var   textedit=   document.getElementById( "textedit ");
textedit.value   =   textedit2;
}
    </script>


现在怎么让网页自动执行这个动作，也就是不需要自己去点那个按钮，默认刷新是一秒吧，例如，一秒就让左边的内容代替右边的内容。

------解决方案--------------------
试一下这个

<form action= "editpage.jsp " method= "post " name= "form1 ">

<textarea rows= "15 " cols= "33 " name= "textedit " wrap= "hard "> </textarea>

<input type= "button " name= "button " value= "从左到右 " title= "submit " onclick= "mk_confirm() ">
<input type= "button " name= "button1 " value= "从右到左 " title= "submit " onclick= "mk_confirm1() ">

<textarea rows= "15 " cols= "33 " wrap= "hard " name= "textedit2 "> </textarea>
</form>
<script>
function mk_confirm()
{
var textedit = document.getElementById( "textedit ").value;
var textedit2= document.getElementById( "textedit2 ");
textedit2.value = textedit;
}
function mk_confirm1()
{
var textedit2 = document.getElementById( "textedit2 ").value;
var textedit= document.getElementById( "textedit ");
textedit.value = textedit2;
}
//加了这个
setInterval( "mk_confirm() ",1000);
</script>