Check if other page field value is empty using jquery or javascript

Hello Freelancer, I need your little help. Description : ----------------- I'm getting all contacts from Mysql db and then showing it on html row. Each row has onClick() method After click on each row it will show a details of contact to the right side of all contacts. This getDetails() call the [login to view URL] (Contact Details) page. In this page I've a field called Note where user can enter [login to view URL] now I want to show a Confirm message to the user Only if user write something on Enter Note box but click other row (all contacts) without save this Enter Notes Confirm mesaage will be : Do you want to save this Notes box before you go to other Contact ? Yes Or No. If Yes then saveNote() will be call otherwise it will load the new contact row. *********************************************** Budget : US $10 (1 hour * $10) No Upfront Milestone Payment. *********************************************** Happy Bidding.