avoid char and symbols in input field

avoid char and symbols in input field

by Keyur Patel

HTML

<input onkeypress="return isNumberKey(event);">

JavaScript

function isNumberKey(evt)
{
  var charCode = (evt.which) ? evt.which : event.keyCode;
 console.log(charCode);
    if (charCode != 46 && charCode != 45 && charCode > 31
    && (charCode < 48 || charCode > 57))
     return false;

  return true;
}