When the judge left mouse click on the current element

<input type='text'  id='check_numb'  onblur='do()'>

　

    function check_numb () { 
         var Numb = $ ( '# check_numb') Val ();. 
            ! IF ((/ ^. 1 (. 3 |. 4 |. 5 |. 6 |. 7 |. 8 |. 9) \ D {. 9} $ /. Test (Numb))) { 
            $ ( '# check_id'). text ( 'phone number is incorrect, please re-enter') 
            return to false 
            } the else { 
                $ ( '# check_id'). text ( '') 
                return to true 
                }

　　

　Function on $ (function ()) outside