<body>
<input type="text" value="0"><br><br>
<input type="submit" value="加一">
<input type="submit" value="清除">
<script type="text/javascript">
var text = document.getElementsByTagName('input')[0];
var add = document.getElementsByTagName('input')[1];
var clear = document.getElementsByTagName('input')[2];
add.onclick = function numberadd(){
text.value++;
}
clear.onclick = function clearnumber(){
text.value = 0;
}
</script>
</body>
03-10
1万+
