<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>测试</title>
</head>
<body>
<textarea name="" id="tex1" cols="30" rows="10"></textarea>
<input type="button" id="btn1" value="运行">
<script>
window.onload=function(){
var oBtn=document.getElementById('btn1');
var oTex=document.getElementById('tex1');
oBtn.onclick=function(){
var oNewWin=window.open("about:blank");
oNewWin.document.write(oTex.value);
}
}
</script>
</body>
</html>//复制代码粘贴到textarea中点运行即可