Looping Function

<script language="javascript">

function copy_tag1()
{ document.form_tag1.tag.select();
window.clipboardData.setData('text',
document.form_tag1.tag.value); }

function copy_tag2()
{ document.form_tag2.tag.select();
window.clipboardData.setData('text',
document.form_tag2.tag.value); }

function copy_tag3()
{ document.form_tag3.tag.select();
window.clipboardData.setData('text',
document.form_tag3.tag.value); }

function copy_tag4()
{ document.form_tag4.tag.select();
window.clipboardData.setData('text',
document.form_tag4.tag.value); }

</script>

<form name="form_tag1">
<input type='text' name="tag" value=&#55613;&#57287;'>
<input type=button value="copy" onclick="copy_tag1()">
</form>

<form name="form_tag2">
<input type='text' name="tag" value=&#55615;&#56350;'>
<input type=button value="copy" onclick="copy_tag2()">
</form>


<form name="form_tag3">
<input type='text' name="tag" value=&#55616;&#56437;'>
<input type=button value="copy" onclick="copy_tag3()">
</form>


<form name="form_tag4">
<input type='text' name="tag" value=&#55617;&#56524;'>
<input type=button value="copy" onclick="copy_tag4()">
</form>

The code above make it copy each tag value by clicking each copy button.

There are four copy_tag functions in the javascript.

If I have more forms to copy, I have to make more copy_tag functions.

Can I make the javascript to loop for many many copy forms with your help?