Validating multiple checkboxes using javascript

Server-side validation incorporates code validation into a form handler. NET application on the server that provides the functionality that your form needs for processing after a customer has submitted it.Because the code is stored on the server, server-side validation requires a roundtrip to the server.(16 printed pages) Introduction Getting Started Writing the Validation Script Connecting the Form to the Script Associating Form Fields with Custom Script Code Listing Conclusion When you create forms, providing form validation is useful to ensure that your customers enter valid and complete data.For example, you may want to ensure that someone inserts a valid e-mail address into a text box, or perhaps you want to ensure that someone fills in certain fields.Caution when using brackets () in scripts : Expression manager uses brackets () to enclose expressions.If you have to use brackets in your Java Script, you must add a space or line feed after the opening bracket () This is from a survey that is a invitation to a longer party, when the user clicks to the next page, the calculated results will be shown.The main problem is that it can't be accessed using ID because every checkbox will have different ID.But they share one common attribute which is "name". I live in World Wide Web and from there take care of this website.

This workaround is in case you need to do some validation involving more than one question, it implies a very little Java Script programming and the use of SGQA Identifiers; this should work on almost any version of Lime Survey.If you wonder what the stuff is, look at SGQA identifier and Using information from previous answers.As of version 1.92, this is easier to do using the min/max/equals_num_value attributes (to validate sums), or the em_validation_q function, which lets you refer to other variables when you validate the current question Expression Manager.We use return false; because when this function is called when the form is submitted and if this textbox is found empty the page shouldn’t be submitted so returning the boolean value false with prevent the form from being submitted.An HTML combobox shows a dropdown list of items from which one item is selected.

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