jQuery addClass example

Change class name on click in jQuery

by uiexp

HTML

<form name="eve" >
<textarea id="ph">9538025770</textarea>
<button onclick="validate()">Click me</button>

</form>

<script>
function validate() {
  
  var regMobile = new RegExp('^[6-9]\d{9}$');
  var description = document.getElementById('ph').value;
  
  if (regMobile.test(description)) {
		 document.write('phone number exists ' + description);
  } else {
  	 document.write('phone number not exists ' + description);
  }
}
</script>