How to remove option from selectbox options using Jquery

Here I am explaining how to remove an option from selectbox or combobox  options list using Jquery. Jquery is a powerful javascript library that provides a lot of predefined functions to achieve our needs.

For removing the option, using remove function(remove()).  
Add following script in onload function.

$("#selectboxid option[value='value']").remove();


selectboxid = ID of your selectbox
value = value of the option which you want to remove.


$(document).ready(function()){
   $("#select-id option[value='0']").remove();
});


Here option value 0 is removed while  the form load.

http://api.jquery.com/remove/

Read more »

Regular expression for validating US phone number

US phone number format validation using regular expression.

The common US phone number format is 3digits-3digits-4digits
eg: 222-333-3333
      111-222-1234
The regular expression for validating this format is

function usphone($string) {
   if(preg_match('/^[0-9]{3}\-[0-9]{3}\-[0-9]{4}$/', $string)) {
    return true;
  }
  else{
    return false;
  }
}

Validation using Javascript

function isUSphone(phoneno) {
   var filter = /^[0-9]{3}\-[0-9]{3}\-[0-9]{4}$/;
   if (filter.test(phoneno))
        returntrue;
    else
        return false; 
}

In Jquery

if($("#phone-num").val().match(/^[0-9]{3}\-[0-9]{3}\-[0-9]{4}$/)) {
  //valid phone number
}
else {
  //not a valid number
}

*phone-num -  id of phone number field(input field)

Read more »