前提是先要把value中的值去掉
------解决方案--------------------
- HTML code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>改变Input Value值</title>
<script type="text/javascript">
function changeValue(){
var value = document.getElementById("inputID");
if(value.value!=""){
value.value=""
}
else{
value.value ="2";
}
}
</script>
</head>
<body>
<div id="content">
<input type='text' name='name' id='inputID' value='1'>
<input type='button' name='name' id='name' value='改变值' onclick = "changeValue()">
</div>
</body>
</html>