日期:2014-05-16 浏览次数:20509 次
<form name="form" >
<input type="text" id="tx1" value="123"><br>
</form>
<script>
alert(form.tx1.value);
</script>
<form id="form" >
<input type="text" id="tx1" value="123"><br>
</form>
<script>
alert(form.tx1.value);
</script>
<form id="form" > //form篇2
<input type="text" id="tx1" value="123"><br>
</form>
<script>
alert(form.elements['tx1'].value);
</script>
<form id="form" > //form篇2
<input type="text" name="tx1" value="123"><br>
</form>
<script>
alert(form.elements['tx1'].value);
</script>