<html>
<body>
<input type ="text" title="aa" name="bb"/>
<input type ="button" value="aa" onclick="overview()">
</body>
<script>
function overview(){
var alltext = document.getElementsByTagName("text");
var value1=alltext[1].value;
alert(value1);
}
</script>
</html>
<body>
<input type ="text" title="aa" name="bb"/>
<input type ="button" value="aa" onclick="overview()">
</body>
<script>
function overview(){
var alltext = document.getElementsByTagName("text");
var value1=alltext[1].value;
alert(value1);
}
</script>
</html>
var alltext = document.getElementsByTagName("text");
应该是
var alltext = document.getElementsByTagName("input");
<body>
<input type ="text" title="aa" name="bb"/>
<input type ="button" value="aa" onclick="overview()">
</body>
<script>
function overview(){
var alltext = document.getElementsByTagName("input");//一个是input,text好像是文本节点
var value1=alltext[0].value;//下标是0
alert(value1);
}
</script>
</html>
这个是获得一个标签名的数组
要取出text 的值有多种方法,比如用Id,var alltext = document.getElementsById("text");,这里的“text ”是Id号,
还有想你写的那样,document.getElementsByTagName("input"),“input”是html标签名,取出的是input的数组,在你的例子中,应该改为:var alltext = document.getElementsByTagName("input");
var value1=alltext[0].value;
<html>
<body>
<!--加一个ID-->
<input type ="text" title="aa" name="bb" id="bb"/>
<input type ="button" value="aa" onclick="overview()">
</body>
<script>
function overview(){
/*FireFox、Safari等其它浏览器也能使用,所
* 以,建议您使用ID标记标签
**/
var alltext = document.getElementById("bb");
var value1=alltext.value;
alert(value1);
}
</script>
</html>
<body>
<input type ="text" title="aa" name="bb"/>
<input type ="button" value="aa" onclick="overview()">
</body>
<script>
function overview(){
var alltext = document.getElementsByName("bb");//getElementsByName取得name为"bb"对象
var value1=alltext.value;
alert(value1);
}
</script>
</html>
<html>
<body>
<input type ="text" title="aa" name="bb"/>
<input type ="button" value="aa" onclick="overview()">
</body>
<script>
function overview(){
var alltext = document.getElementsByTagName("input");
var value1=alltext[0].value;
alert(value1);
}
</script>
</html>
<body>
<input type ="text" title="aa" name="bb"/>
<input type ="button" value="aa" onclick="overview()">
</body>
<script>
function overview(){
var alltext = document.getElementsByTagName("input");//一个是input,text好像是文本节点
var value1=alltext[0].value;//下标是0
alert(value1);
}
</script>
</html>
var value1=alltext[0].value;
或者:
var alltext = document.getElementsByName("bb");
var value1=alltext[0].value;
var value1=alltext[0].value;
或者:
var alltext = document.getElementsByName("bb");
var value1=alltext[0].value;