Cases
Add the onsubmit attribute to the form or the Add OnClick property of the Submit button, the value is return check (), the check is a JavaScript function, the validation table is single, no call, even if the validation fails will be submitted. In the check function, the validation failure returns false and returns true successfully.
Code:
| The code is as follows |
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| <! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 "/>
<title> Untitled Document </title>
<body>
<form action= "index.php" method= "Get" Name= "Form1" >
Name: <input type= "text" name= "name" id= "name"/><br/>
Ages: <input type= "text" name= "age" id= "aged"/><br/>
<input type= "Submit" onclick= "return Check ()"/>
</form>
<script language= "javascript" type= "Text/javascript" >
function Check () {
var age=parseint (Document.form1.age.value);
if (age<18) {
Alert ("Less than 18");
return false;
}else{
return true;
}
}
</script>
</body>
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Example 2
Validating plug-ins with jquery forms validator
Call simple, style generic, you don't have to write style. A very useful Web page forms validation control.
First look at the effect, the following figure:
| The code is as follows |
Copy Code |
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<script type=text/javascript src= "Js/validator.js" ></SCRIPT>
<script type=text/javascript>
var a = Validator ({
"Form": "Validator-form",
Ajaxsubmit:true,
Beforsubmit:function () {
Alert ("Function executed before form submission");
},
Aftersubmit:function () {
Alert ("The data returned after the AJAX submission is:" +this.responsetext);
}
}). Add ({
"Target": "username",
"Rule_type": "username",
' Action ': ' 2.php ',
' Tips ': ' Say something good '
}). Add ({
"Target": "Password",
"Rule_type": "Password"
}). Add ({
"Target": "Confirm-password",
"Rule_type": "Password",
"Sameto": "Password",
' ERROR ': ' You fill in the wrong password or different from the original password '
}). Add ({
"Target": "Age",
"Rule_type": "number| | Empty ",
"Error": ' Although this thing is not required, but since you fill in, you fill it out right. '
}). Add ({
"Target": "Birthday",
"Rule_type": "date| | Empty
}). Add ({
"Target": "Id-card",
"Rule_type": "idcard| | Empty
}). Add ({
"Target": "Email",
"Rule_type": "Email"
}). Add ({
"Target": "QQ",
"Rule_type": "qq| | Empty
}). Add ({
"Target": "Telephone",
"Rule_type": "phone| | Empty
}). Add ({
"Target": "Mobile",
"Rule_type": "mobile| | Empty
}). Add ({
"Target": "Phone",
"Rule_type": "phone| | Mobile ",
"Tips": "Please enter your mobile phone or landline phone number!" "
}). Add ({
"Target": "Zip-code",
"Rule_type": "zip| | Empty
}). Add ({
"Target": "Ip-address",
"Rule_type": "ip| | Empty
}). Add ({
"Target": "url",
"Rule_type": "url| | Empty
}). Add ({
"Target": "Message",
"Rule_type": "Require"
});
var reset = document.getElementById (' reset ');
var del = document.getElementById (' del ');
Reset.onclick = function () {
A.reset ();
}
Del.onclick = function () {
A.remove (' username ');
}
</SCRIPT>
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