IsNumeric() Function for JS

If your database is expecting a numeric value, this function will validate its numericness.  I have a couple of functions that checks for numbers. This one allows you to modify the alert() message specifically for a field.

function IsNumeric(inputVal,sErrorMsg) {
     if (isNaN(parseFloat(inputVal))) {
          alert(sErrorMsg)
          return false;
     }
     return true
}