JS验证

     //表单验证


    function check() {
        productName = document.getElementById("productName");
        if (productName.value == null || productName.value.length == 0) {
            alert("请填写商品名称！！");
            productName.value = "";
            productName.focus();
            return false;
        }
        explanation = document.getElementById("explanation");
        if (explanation.value == null || explanation.value.length == 0) {
            alert("请填写分享描述！！");
            explanation.value = "";
            explanation.focus();
            return false;
        }
        picFile = document.getElementById("picFile");
        if (picFile.value == null || picFile.value.length == 0) {
            alert("请上传商品图片！！");
            picFile.value = "";
            picFile.focus();
            return false;
        }
        classify1 = document.getElementById("classify1");
        if (classify1.value == null || classify1.value.length == 0) {
            alert("请选择一级分类！！");
            classify1.value = "";
            classify1.focus();
            return false;
        }
        classify2 = document.getElementById("classify2");
        if (classify2.value == null || classify2.value.length == 0) {
            alert("请选择二级分类！！");
            classify2.value = "";
            classify2.focus();
            return false;
        }

        sku = document.getElementById("sku");
        if (sku.value == null || sku.value.length == 0) {
            alert("请填写商品属性！！");
            sku.value = "";
            sku.focus();
            return false;
        }
        marketPrice = document.getElementById("marketPrice");
        if (marketPrice.value == null || marketPrice.value.length == 0) {
            alert("请填写商品市场价格！！");
            marketPrice.value = "";
            marketPrice.focus();
            return false;
        }

        var re = /^\d+(?=\.{0,1}\d+$|$)/
        var pattern = /^\d+$/;
        if (!pattern.test(marketPrice.value)&&!re.test(marketPrice.value)) {
            alert("商品市场价格必须为数字！！");
            //skuid.focus();
            return false;
        }

        groupPrice = document.getElementById("groupPrice");
        if (groupPrice.value == null || groupPrice.value.length == 0) {
            alert("请填写商品团购价格！！");
            groupPrice.value = "";
            groupPrice.focus();
            return false;
        }

        var pattern = /^\d+$/;
        if (!pattern.test(groupPrice.value)&&!re.test(groupPrice.value)) {
            alert("商品团购价格必须为数字！！");
            //skuid.focus();
            return false;
        }


        productCode = document.getElementById("productCode");
        if (productCode.value == null || productCode.value.length == 0) {
            alert("请填写商品货号！！");
            productCode.value = "";
            productCode.focus();
            return false;
        }

        startTime = document.getElementById("startTime");
        if (startTime.value == null || startTime.value.length == 0) {
            alert("请填写开始时间！！");
            startTime.value = "";
            startTime.focus();
            return false;
        }
        endTime = document.getElementById("endTime");
        if (endTime.value == null || endTime.value.length == 0) {
            alert("请填写结束时间！！");
            endTime.value = "";
            endTime.focus();
            return false;
        }
        sum = document.getElementById("sum");
        if (sum.value == null || sum.value.length == 0) {
            alert("请填写商品数量！！");
            sum.value = "";
            sum.focus();
            return false;
        }
        var pattern = /^\d+$/;
        if (!pattern.test(sum.value)) {
            alert("商品数量必须为数字！！");
            //skuid.focus();
            return false;
        }
        startSum = document.getElementById("startSum");
        if (startSum.value == null || startSum.value.length == 0) {
            alert("请填写初始抢购数！！");
            startSum.value = "";
            startSum.focus();
            return false;
        }
        var pattern = /^\d+$/;
        if (!pattern.test(startSum.value)) {
            alert("初始抢购数必须为数字！！");
            //skuid.focus();
            return false;
        }
        everyIdLimit = document.getElementById("everyIdLimit");
        value = everyIdLimit.value;
        if (document.getElementById("radio").checked && value <= 0) {

            alert("限购数必须大于0！！");
            everyIdLimit.value = "";
            everyIdLimit.focus();
            return false;

        }
        var pattern = /^\d+$/;
        if (document.getElementById("radio").checked && !pattern.test(startSum.value)) {
            alert("限购数必须为数字！！");
            //skuid.focus();
            return false;
        }

        /*  shipMethod = document.getElementsByName("shipMethod");
            alert(shipMethod);
            if (shipMethod == null || shipMethod.length == 0) {
                alert("请选择配送方式！！");
                shipMethod= "";
                shipMethod.focus();
                return false;
            } */
        if (!document.getElementById("shipMethod").checked) {
            alert("请选择配送方式！！");
            shipMethod.focus();
            return false;
        }
        if (!document.getElementById("paymentType").checked) {
            alert("请选择支付方式！！");
            paymentType.focus();
            return false;
        }
        /* paymentType = document.getElementById("paymentType");
        if (paymentType.value == null || paymentType.value.length == 0) {
            alert("请选择支付方式！！");
            paymentType.value = "";
            paymentType.focus();
            return false;
        } */
        notice = document.getElementById("notice");
        if (notice.value == null || notice.value.length == 0) {
            alert("请填写团购须知！！");
            notice.value = "";
            notice.focus();
            return false;
        }
        productInfo = document.getElementById("productInfo");
        if (productInfo.value == null || productInfo.value.length == 0) {
            alert("请填写商品详情！！");
            productInfo.value = "";
            productInfo.focus();
            return false;
        }
        document.form.submit();
    }