'<form>',
'<div id="field">',
'<input type="text">',
'</div>',
'<input type="button" onclick="plus()">',
'</form>',

'<script>'
'var n=0;'
'function plus() {'
'document.getElementById('&uf('+9F039')'field'&uf('+9F039')').innerHTML+='&uf('+9F039')'<input type='&uf('+9F039')'text'&uf('+9F039')' id="id'&uf('+9F039')'+n+'&uf('+9F039')'">'&uf('+9F039')''
'n++'
'};'
'</script>',