function valForm(sForm){

	if (trim(sForm.Qty.value) == ''){
	    alert("Please insert qty.");
	    sForm.Qty.focus();
	    return false;
	}
    if (isNaN(trim(sForm.Qty.value))){
	    alert("The qty can be number only.");
	    sForm.Qty.focus();
	    return false;
    }
    if (parseInt(trim(sForm.Qty.value)) < 1){
	    alert("The qty can be less than 1.");
	    sForm.Qty.focus();
	    return false;
    }
	return true;
}