框家内页值传递不过去是怎么回事.

框家内页值传递不过去是怎么回事.
我用top.

一个页:     01.htm
<input   type= "text "   id= "txt_1 "   name= "txt_1 ">
<iframe   id= "iframe "   name= "iframe "   width= "50% "   height= "40 "   src= "02.htm "> </iframe>

02.htm
    <script   language= "javascript ">
                function   getpar(str)
                {

                                            top.document.getelemetnById( "txt_image ").value=str;     //这样怎么不行啊  
                }
</script>
<a   href= "# "   inclick= "getpar( '00 '); "> 传递不过去值 </a>


因该怎么写才能把02.htm把值传递到01.htm   啊。也就是写入到01.htm里面的文本框里面去啊。  


------解决方案--------------------
请参考以下代码:
01.htm
<form name= "form1 " action= " " method= "post ">
<input type= "text " id= "txt1 " name= "txt1 ">
</form>
<iframe id= "iframe " name= "iframe " width= "50% " height= "40 " src= "02.htm "> </iframe>

02.htm

<script language= "javascript ">
function getpar(str)
{


window.parent.document.form1.txt1.value=str; //这样怎么不行啊
}
</script>
<a href= "# " onclick= "getpar( '00 '); "> 传递不过去值 </a>

------解决方案--------------------
01.htm
<input type= "text " id= "txt1 " name= "txt1 ">
<iframe id= "iframe " name= "iframe " width= "50% " height= "40 " src= "02.htm "> </iframe>

02.htm

<script language= "javascript ">
function getpar(str) {
window.top.document.getElementById( "txt1 ").value = str;
}
</script>
<a href= "# " onclick= "getpar( '00 '); "> 传递过去 </a>