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<html>
<head>
<script>
function add1()
{
var obtn=document.createElement("input");
obtn.setAttribute("type","button");
obtn.setAttribute("value","test1");
document.body.appendChild(obtn);//×¢ÒâÈç¹ûÓÐform±íµ¥²»ÒªÍü¼Ç¼ÓÈë±íµ¥
}
function add2()
{
var obtn=document.createElement("input");
obtn.type="button";
obtn.value="test2";
document.body.appendChild(obtn);
}
function add3()
{
var obtn="<input type='button' value='test3'/>";
document.body.innerHTML=obtn;//Õâ¸ö·½·¨»áɾ³ýbodyÖÐµÄÆäËü¿Ø¼þ ¿ÉÒÔÔ¤Ïȼӵ½¹Ì¶¨µÄÈÝÆ÷ÖÐ
}
</script>
</head>
<body>
<input type="button" value="add1" onclick="add1()"/>
<input type="button" value="add2" onclick="add2()"/>
<input type="button" value="add3" onclick="add3()"/>
</body>
</html>
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