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<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<script type="text/javascript">
function les(){
var a=document.getElementsByName("one");
var b=document.getElementsByTagName("input");
for(var i=0;i<b.length;i++){
b[i].readOnly="readonly";
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}
function les1(){
var b=document.getElementsByTagName("input");
for(var i=0;i<b.length;i++){
b[i].readOnly=false;
b[i].style.background="#00";
}
}
</script>
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<body onload="les()">
<input type="text" name="one" style="background:;" />
<input type="text" name="one" />
<input type="button" onclick="les()" />
<input type="button" onclick="les1()" />
</body>
</html>
原文：http://www.cnblogs.com/275147378abc/p/5497752.html