numeric validation on javascript in webform

numeric validation on javascript in webform

  function IsNumeric(sText)
        {
                var ValidChars = "0123456789.";
                var IsNumber=true;
                var char;
                
                for (i = 0; i < sText.length && IsNumber == true; i++)
                {
                Char = sText.charAt(i);
                if (ValidChars.indexOf(Char) == -1)
                {
                IsNumber = false;
                }
                }
                
                return IsNumber;
             }


///function

  function SaveProductDeal(dealId,prodId,CaTid,Price,btnAdd,btnUpd)
               {    
                    if (IsNumeric(document.getElementById(Price).value) == false)
                       {
        
        
                alert("Please remove all non-Numeric values from Price");
                 return false;
                   }
                    else
                      { 
                           ///function
                            return false;
                           }
                 }