function validate(form) { checkMember = form.cbbMember.selectedIndex checkProductName = trim(form.txtProductName.value) checkPrice = trim(form.txtPrice.value) checkGrade = trim(form.txtGrade.value) checkForm = form.cbbForm.selectedIndex checkMaker = trim(form.txtMaker.value) checkQuantity = trim(form.txtQuantity.value) checkPayment = trim(form.txtPayment.value) checkValidity = trim(form.txtValidity.value) checkRemark = trim(form.txtRemark.value) if (checkProductName.length < 1 ){ alert("Please enter your product name") return false } else if (checkPrice.length < 1 ){ alert("Please enter product price") return false } else if (checkGrade.length < 1 ){ alert("Please enter grade") return false } else if (checkForm== 0){ alert("Please select form") return false } else if (checkMaker.length < 1){ alert("Please enter maker") return false } else if (checkQuantity.length < 1){ alert("Please enter quantity") return false } else if (!isChecked(form)) { alert("Please enter on going") return false } else if (checkPayment.length < 1){ alert("Please enter payment") return false } else if (checkValidity.length < 1){ alert("Please enter validity") return false } else if (checkRemark.length < 1){ alert("Please enter remark") return false } else if (checkMember == 0 ){ alert("Please select your member name") return false } return true } function isChecked(form) { var i for (i=0;i