$(function(){
$('#tele').change(function(){
 $(this).val( $(this).val().replace(/[^0-9]+/,'') );
});

if(0)
    $("#tele").keydown(function(e){
    window.console.log(e.keyCode);
     switch(e.keyCode){
      case 8:
      case 13:
      case 9:
      case 37:
      case 38:
      case 39:
      case 40:
      case 48:
      case 49:
      case 50:
      case 51:
      case 52:
      case 53:
      case 54:
      case 55:
      case 56:
      case 57:
      case 96:
      case 97:
      case 98:
      case 99:
      case 100:
      case 101:
      case 102:
      case 103:
      case 104:
      case 105:
       return true;
     }
     
     return false;
    });
});