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<input type="text" name="n1" id="n1" readonly="readonly" size="15" tabindex="1" value="this is test" onfocus="test(this)" />
<input type="text" name="n2" id="n2" size="15" tabindex="2" onfocus="test(this)" />
<script type="text/javascript">
function test(sEle){
if(sEle.getAttribute('readonly')==null){
alert('f');
}else{return;}
}
</script>