Software development and programming - Showing posts from August, 2022

ASP_Net Custom Client-Side Validation

ASP . NET Custom Client-Side Validation I have a custom validation function in JavaScript in a user control on a .Net 2.0 web site which checks to see that the fee paid is not in excess of the fee amount due. I've placed the validator code in the ascx file, and I have also tried using Page.ClientScript.RegisterClientScriptBlock() and in both cases the validation fires, but cannot find the JavaScript function. The output in Firefox's error console is "feeAmountCheck is not defined" . Here is the function (this was taken directly from firefox->view source) <script type="text/javascript"> function feeAmountCheck(source, arguments) { var amountDue = document.getElementById('ctl00_footerContentHolder_Fees1_FeeDue'); var amountPaid = document.getElementById('ctl00_footerContentHolder_Fees1_FeePaid'); if (amountDue.value > 0 && amountDue >= amountPaid) { arguments.Is...

Multiply in JavaScript (Solved) This code does not execute properly. Try to figure out why. Solution function multiply(a, b) { return a * b; } Multiplication The multiplication of whole numbers may be thought of as repeated addition; that is, the multiplication of two numbers is equivalent to adding as many copies of one of them, the multiplicand, as the quantity of the other one, the multiplier. Both numbers can be referred to as factors. Example: 3 * 4 = 4 + 4 + 4 = 12 return The return statement ends function execution and specifies a value to be returned to the function caller. Syntax return [expression]; Parameters expression The expression whose value is to be returned. If omitted, undefined is returned instead. Description When a return statement is used in a function body, the execution of the function is stopped. If specified, a given value is returned to the function caller. How to detect which one of the defined font was used in a web page? ...

How to detect which one of the defined font was used in a web page? Suppose I have the following CSS rule in my page: body { font-family: Calibri, Trebuchet MS, Helvetica, sans-serif; } How could I detect which one of the defined fonts were used in the user's browser? For people wondering why I want to do this is because the font I'm detecting contains glyphs that are not available in other fonts. If the user does not have the font, then I want it to display a link asking the user to download that font (so they can use my web application with the correct font). Currently, I am displaying the download font link for all users. I want to only display this for people who do not have the correct font installed. One thing to keep in mind is that some browsers will replace certain missing fonts with similar fonts, which is impossible to detect using the JavaScript/CSS trick. For example, Windows browsers will substitute Arial for Helvetica if it's not installed. The tr...