运行结果尺寸: 300 x 150
x
 
<!DOCTYPE html>
<html>
<body>
<form name="Form1"></form>
<form name="Form2"></form>
<form name="Form3"></form>
<p id="demo"></p>
<script>
document.getElementById("demo").innerHTML =
"The name of the first for is " + document.forms[0].name;
</script>
</body>
</html>
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报个问题: