如何用javascript 做一个表单提交
<html>
<head>
<script language=javascript>
function a()
{
var n=document.getElementById('n').value;
var m=document.getElementById('m').value;
var c=parseInt(a)+parseInt(b);
}
</script>
</head><body>
<form name>
<input type="text" id="n"/> +
<input type="text" id="m"/> =
<input type="text" id="c"/><input onload=javascript:a(); type="button" value="加法"/>
</body>
</html>
<html>
<head>
<script language=javascript>
function a()
{
var n=document.getElementById('n').value;
var m=document.getElementById('m').value;
var c=parseInt(a)+parseInt(b);
}
</script>
</head><body>
<form name>
<input type="text" id="n"/> +
<input type="text" id="m"/> =
<input type="text" id="c"/><input onload=javascript:a(); type="button" value="加法"/>
</body>
</html>
<input name="x"需要写name属性
<html>
<head>
<script language=javascript>
function a()
{
var n=document.getElementById('n').value;
var m=document.getElementById('m').value;
var c=parseInt(m)+parseInt(n);document.myform.sum.value=c;
}
</script>
</head><body>
<form name="myform">
<input type="text" id="n"/> +
<input type="text" id="m"/> =
<input type="text" id="sum"/><input onclick="a();" type="button" value="加法"/>
</body>
</html>还有你没有做输入校验。是否只能输入数字?