从京东的订单流程中摘抄下来JS表单验证函数:
/** * <strong>判断是否是空</strong> * @param value */ function isEmpty(value){ if(value == null || value == "" || value == "undefined" || value == undefined || value == "null"){ return true; } else{ value = value.replace(/\s/g,""); if(value == ""){ return true; } return false; } }