Enter the content in the first input box. textarea automatically obtains the JavaScript code for the value of the first file box.

How to input the content in the first input file. textarea automatically obtains the value of the first file box;
That is to say, the value obtained from the first input edge input textarea edge
Thank you.

<Input type = text name = "mytxt" onkeyup = "mytxta. value = This. Value">
<Textarea name = 'mytxta '>
</Textarea>

<Input type = "text" onkeyup = "Send (this)">
<Textarea name = "content" Cols = 40 rows = 5> </textarea>
<Script language = "JavaScript">
Function send (OBJ)
{
Document. All. content. value = obj. Value
}
</SCRIPT>

<Input type = "text" size = "20" onkeyup = "refreshvalue (this)"> </input>
<Textarea id = "T1" rows = "4" Cols = "40"> </textarea>
<Script language = "JavaScript">
Function refreshvalue (OBJ ){
VaR S = obj. value;
Document. All ("T1"). value = s;
}
</SCRIPT>