// JavaScript Document
function isNum(s){
if(s ==""){
return false
}
for (i=0; i<s.length;i++){
if (s.charAt(i)<"0"){
return false
}
if(s.charAt(i)> "9"){
return false
}
}
return true
}
function checkForm(val){
if (!isNum(val.Quantity.value)){
alert('You must enter a numeric value for the quantity')
val.Quantity.value=""
val.Quantity.focus()
val.Quantity.select()

return false
}
return true
}