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var datas = '[';
for(var i=0; i< arr.length; i++){
datas += '{';
foreach(var field in arr[i])
datas += '"' + field + '":"' + encodeURIComponent(arr[i].getAttribute(field)) + '",';
datas += datas.substr(0, datas.length - 1) + '}';
}
datas += "]";
<input type="text" id="txt" size="99999" />
<input type="button" onclick="aaa()" />
<script>
function aaa(){
var a=new Array([['Sony','a0'], ['Samsumg','a1'], ['LG','a2'], ['Vizio','a3'], ['Insignia', 'a4']],[['Sony','b0'], ['Samsumg','b1'], ['LG',21], ['Vizio','b2'], ['Insignia', 'b3']]);
var bt=','+a.toString()+',';
document.getElementById('txt').value= bt.replace(/,Sony,/g,',').replace(/,Samsumg,/g,',').replace(/,LG,/g,',').replace(/,Vizio,/g,',').replace(/,Insignia,/g,',');
}
</script>