Form focus order tabindex and corresponding enter key submission_Basic knowledge

The focus tab order of the form: determined by tabindex. If the value is default, select the order. User:
Password:Correspond to the onsubmit event:

Copy the code The code is as follows :

Pay attention to the usage of return js:

Copy code The code is as follows:

function subUser(){
var username=$("#uname").val();
var password=$("#upwd").val();
var checkCode=$("#checkCode").val();
if(username==""){
$("#msg").html("Please enter your username!");
$("#uname").focus();
return false;
}else if(password==""){
$("#msg").html("Please enter Password!");
$("#upwd").focus();
return false;
}else if(checkCode==''){
$("#msg") .html("Please enter the verification code!");
$("#checkCode").focus();
return false;
}else{
document.loginform.submit();
return false;
}
return false;
}

Form gets focus event: $("#nameInput").focus()