<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<form >
password1:<input type="text" id="a" required="required"/><br />
password2:<input type="text" id="b" onblur="check()" required="required"/>
<input type="submit" value="提交" />
</form>
<script>
function check(){
var password1=document.getElementById("a").value;
var password2=document.getElementById("b").value;
if(password1!=password2){
alert("密码不一致请核查");
}
}
</script>
</body>
</html>