Using Javascript to Validate Fields in a Smart Capture Form

What is Using JavaScript to Validate Fields in a Smart Capture Form

You can use Javascript to validate fields and ensure subscribers enter information into the required fields. This JavaScript helps ensure that the information entered in the fields meet the requirements of the field to which that information will be saved.

Why Use JavaScript to Validate Fields in a Smart Capture Form

By using JavaScript, you can ensure that you get correct and valid information entered into your Smart Capture form. The form rejects incorrect or incorrectly formatted information and allows only valid entries.

How to Use JavaScript to Validate Fields in a Smart Capture Form

Insert the code in the HTML window of the content editor in order to include this functionality of your page. The screen and sample code shown below shows the JavaScript used to validate the subscriber's first name, last name, and email address. If any of these fields are left blank, the JavaScript prompts the user to enter the information before continuing.

<form name="myform" method="post" action="%%= RequestParameter('PAGEURL') =%%" onsubmit="return validate()"> 
       <script type="text/javascript"> 
       function validate() 
       { 
       var fname=document.getElementById("FirstName").value; 
       var lname=document.getElementById("LastName").value; 
       var femail=document.getElementById("Email").value; 
       submitOK="true"; 
       if (fname.length<1) 
       {  
       var Valert = "Please Enter your First Name \n"; 
       submitOK="false"; 
       }  
       else 
       { 
       var Valert = ""; 
       } 
       if (lname.length<1) 
       { 
       Valert = Valert + "Please Enter your Last Name \n"; 
       submitOK="false"; 
       } 
       if (femail.length<1) 
       { 
       Valert = Valert + "Please Enter your Email Address \n"; 
       submitOK="false"; 
       } 
       if (submitOK=="false") 
       { 
       alert(Valert); 
       return false; 
       } 
              } 
       </script>