// JScript File
function isNumeric(txtBoxName)
{
   var sText = document.getElementById(txtBoxName).value;
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;
   if(sText.length==0)
   {
    alert('Quantity cannot be blank');
    return false;
   }
   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
     Char = sText.charAt(i); 
     if (ValidChars.indexOf(Char) == -1) 
     {
        IsNumber = false;
     }
   }   
   if(Number(sText)==0)
   {
        IsNumber = false;
   }
   if(!IsNumber)
    alert('Invalid Quantity');
   return IsNumber;    
}
function isNumericTextBox(txtBox)
{
   var sText = txtBox.value;
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;
   if(sText.length==0)
   {   
    return false;
   }
   for (i = 0; i < sText.length && IsNumber == true; i++) 
   { 
     Char = sText.charAt(i); 
     if (ValidChars.indexOf(Char) == -1) 
     {
        IsNumber = false;
     }
   }   
   return IsNumber;    
}