<html>
<head>
</head>
<body>
<div id="cost"></div>
<script>
var cost = document.getElementById('cost');
var a='<span id="span_one">Brower RDU </span><span>code:<span id="span_tree">00111</span></span>'
cost.innerHTML=a;
</script>
</body>
</html>
<html>
<head>
</head>
<body>
<div id="cost"></div>
<script>
var cost = document.getElementById('cost');
var Naimenow = 'code:';
var textSpan = '00111';
var a='<span id="span_one">Brower RDU </span>';
var b='<span>'+Naimenow+'<span id="span_tree"></span>'+ textSpan +'</span>';
cost.innerHTML=a+b;
</script>
</body>
</html>