UK TelePhone number validation using JavaScript

Question

Hi therei would like to know how to validate a string of unitedkingdoms phone number like this 447705613199it must have 44 in front of the uks phone number  if user input 07705613199 into a textbox it will convert to 447705613199  or even user input invalid data  it will show a pop up  invalid phone number can we do this with javascript  thanks in advance

Azim · Accepted Answer

HTMLlthtml xmlns34httpwwww3org1999xhtml34gtlthead id34Head134 runat34server34gt    lttitlegtlttitlegtltheadgtltscript type34textjavascript34gt    function ValidateNumbertxt                if txtvaluelength lt 11             alert39Invald Number39                else             if txtvaluecharAt0  34034                 alert39Invald Number39                        else                 var num  txtvaluesubstr1                documentgetElementById34lttxtUKPhoneNoClientID gt34value  344434  num                        ltscriptgtltbodygt    ltform id34form134 runat34server34gt    ltdivgt        ltaspTextBox ID34txtUKPhoneNo34 runat34server34  onchange34ValidateNumberthis34 gt    ltdivgt    ltformgtltbodygtlthtmlgt

UK TelePhone number validation using JavaScript

Company

Explore

Follow us

Contact Us