JS验证表单(持续增加)

    //增加的验证表单用到的函数
    function isnull(obj)
    ...{
            var str = obj.value.trim();
            if(str.length==0||str=="")
            ...{
                return true;
            }
            else
            ...{
                return false;
            }
    }
    function String.prototype.trim()...{return this.replace(/(^s*)|(s*$)/g,"");}
    function canSubmit()
    ...{
            var countyName = document.getElementById('countyName');
            var streetName = document.getElementById('streetName');
            var communityName = document.getElementById('communityName');
            var superMarketType = document.getElementById('superMarketType');
            var superMarkeTank = document.getElementById('superMarkeTank');
            var isStop = document.getElementById('isStop');
            var businessType = document.getElementById('businessType');
            var establishDateStr = document.getElementById('establishDateStr');
            var superMarketName = document.getElementById('superMarketName');
            var superMarketArea = document.getElementById('superMarketArea');
            var superMarketPersonNum = document.getElementById('superMarketPersonNum');
            if(isnull(countyName)||isnull(streetName)||isnull(communityName)||isnull(superMarketType)||isnull(superMarkeTank)||isnull(isStop)||isnull(businessType)||isnull(establishDateStr)||isnull(superMarketName)||isnull(superMarketArea)||isnull(superMarketPersonNum))
            ...{
                return false;
            }
            else
            ...{
                return true;
            }
    }

 提交按钮函数调用

    function onSaveCheck()...{
        if (canSubmit())
        ...{
            var strForm  = document.loveSuperMarketForm;
            var strUrl = "";
        
             strUrl = "editLoveSuperMarket.do?method=editSave";
             strForm.action = strUrl;
         
             strForm.submit();
        }
        else
        ...{
            window.alert("保存失败，尚有必填信息未填入！");
        }
    }