Email ID & mobile number validation in JS

Below are the script by which you can validate email id and mobile number field.

Step 1: Make the form

<div class="form-level">
     <input type="text" class="form-control" name="email" placeholder="Email Id" />
     <span class="form-icon fa fa-envelope"></span>
</div>
<div class="form-level">
      <input name="mobile" placeholder="Enter your Mobile Number" id="mobile" class="form-control" value="" type="text">
      <span class="form-icon fa fa-phone"></span>
</div>

Now apply the below script in your head section

var email = document.fromValidate.email;
var mobile = document.fromValidate.email;
if(email.value==''){
   window.alert('Pleaseer the email id');
   email.focus();
   return false;
}
if(email.value.indexOf('@',0 window.alert('Pleaseer the valid email');
  email.focus();
  return false;
}
if(email.value.indexOf('.',0 window.alert('Pleaseer the valid email');
  email.focus();
  return false;
}
if(mobile.value==''){
  window.alert('Pleaseer the mobile number')
  mobile.focus();
  return false;
}
if(mobile.value.length<10  window.alert('Pleaseer valid mobile number');
  mobile.focus();
}
if(mobile.value.length>10 window.alert('Pleaseer valid mobile number');
 mobile.focus();
}
if(!parseInt(mobile.value)){
  window.alert("Enterts only");
  mobile.focus();
  return false;
}
return true;
}