jQuery autoruns functions on change events when page is loaded
I have made a function that validates inputs with for different kind of strings. I am having serious issues with a few things. I call it on form submit and for each input on change. I have written my code below and then the calling of function. Thing is: when I call it on change and refresh the page, it automatically runs the validations on change when the page is loading and renders the errors.
var Val = {
'string': function(ident, req, regexp, offset, limit) {
var ele = $(document.getElementById(ident));
Val.errors = false;
if (!ele.val() && req == 1) {
alert('blank');
Val.errors = true;
$("#" + ident + "Error").html("This field cannot be empty.");
$("#" + ident + "Error").show("fast");
}else if ((ele.val().length <= offset || ele.val().length > limit) && Val.errors == false) {
alert('not long enough');
Val.errors = true;
$("#" + ident + "Error").html("This field must be between " + offset + " & " + limit + " charecters long");
$("#" + ident + "Error").show("fast");
}else if (regexp !== null) {
switch (regexp) {
case 'text':
var regEx = /^([a-zA-Z]+)$/g;
break;
case 'number':
var regEx = /^([0-9]+)$/g;
break;
case 'email':
var regEx = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/g;
break;
case 'date':
var regEx = /^([123]0|[012][1-9]|31)-(0[1-9]|1[012])-(19[0-9]{2}|2[0-9]{3})$/g;
break;
case 'alphanum':
var regEx = /^([a-zA-Z0-9_\-\.]+)$/g;
break;
default:
break;
}
if (!regEx.test(ele.val()) && Val.errors == false) {
alert('not valid');
Val.errors = true;
$("#" + ident + "Error").html("This field is not valid");
$("#" + ident + "Error").show("fast");
}
}
if (!Val.errors){
$("#" + ident + "Error").hide("fast");
}
},
'send': function() {
if (!Val.errors) {
$('#form').submit();
}
}
}
Calling of the function:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Form Validations</title>
<script type="text/javascript" language="JavaScript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script type="text/javascript" language="JavaScript" src="js/gcui.lsat.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$('#send').click(function(){
checkEmail();
checkUsername();
Val.send();
});
$('#emailID').change(checkEmail());
$('#username').change(checkUsername());
function checkEmail(){
Val.string('email', 1, 'username', 10, 100);
}
function checkUsername(){
Val.string('username', 1, 'alphanum', 5, 15);
}
});
</script>
</head>
<body>
<form id="form" action=开发者_运维技巧"">
<input type="text" id="email" name="email" title="Email" />
<input type="text" id="username" name="username" title="Username" />
<input type="button" id="send" value="Submit" />
</form>
Email: <div id="emailError"></div><br/>
Username: <div id="usernameError"></div>
</body>
</html>
$('#emailID').change(checkEmail());
Means "Run checkEmail and pass the return value to the change method"
You want:
$('#emailID').change(checkEmail);
Meaning "Pass the checkEmail function to the change method"
In your $('#send').click(function(){ you do submit it two times. The first time when you do the validation and the second time when the button press is fired. Add the line Return False; just after the Val.send(); and you only get the forum to submit if there form are filled out correct
加载中,请稍侯......
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