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1.ajax提交表单时,代码
<form id="sub">
<input type="text" name="name" required />
<input type="submit" id="submit" />
</form>
<script>
$("#sub").submit(function(){
$.ajax({
...
})
});
</script>
2.用a标签作为提交按钮时，代码
<!DOCTYPE HTML>
<html>
<head>
<meta charset=UTF-8 />
<title></title>
<style type="text/css">
</style>
<script type="text/javascript">
function sub ()
{
document.getElementById ('sub').click ();
}
</script>
</head>
<body>
<form name="form">
<input type="text" required="required" />
<input style="display: none;" type="submit" id="sub" value="submit" />
</form>
<a href="#" onclick="sub();">submit</a>
</body>
</html>
参考：https://blog.csdn.net/PlainWaterh/article/details/56836974