Multiple radio button groups in one form
Set equal name attributes to create a group;
HTML
Changing image sizes proportionally using CSS
This is a known problem with CSS resizing. Unless all images have the same proportion, you have no way to do this via CSS. The best approach would be to have a container, and resize one of the dimensions (always the same) of the images. In my example I resized the width. If the container … Read more
How to darken a CSS background image?
This should work
CSS Background Image Not Displaying
According to your CSS file path, I will suppose it is at the same directory with your HTML page, you have to change the url as follows:
How do I set a background-color for the width of text, not the width of the entire element, using CSS?
Put the text in an inline element, such as a <span>. And then apply the background color on the inline element. An inline element is as big as its contents is, so that should do it for you.
Disable Scrolling on Body
Set height and overflow: http://jsfiddle.net/q99hvawt/
Bootstrap 4 images thumbnail classes
According to the docs v4, you are looking for img-thumbnail (which should be used in img tag instead of col-*-* as you have) Notes: In v4 col-xs was replaced by col- I’ve added img-fluid utility class in order to make images responsive
WebForms UnobtrusiveValidationMode requires a ScriptResourceMapping for ‘jquery’. Please add a ScriptResourceMapping named jquery(case-sensitive)
You need a web.config key to enable the pre 4.5 validation mode. More Info on ValidationSettings:UnobtrusiveValidationMode: Specifies how ASP.NET globally enables the built-in validator controls to use unobtrusive JavaScript for client-side validation logic. Type: UnobtrusiveValidationMode Default value: None Remarks: If this key value is set to “None” [default], the ASP.NET application will use the pre-4.5 behavior (JavaScript inline in the … Read more
Vertical Text Direction
Alternative approach: http://www.thecssninja.com/css/real-text-rotation-with-css
What is href=”#” and why is it used?
About hyperlinks: The main use of anchor tags – <a></a> – is as hyperlinks. That basically means that they take you somewhere. Hyperlinks require the href property, because it specifies a location. Hash: A hash – # within a hyperlink specifies an html element id to which the window should be scrolled. href=”#some-id” would scroll to an element on the current page such … Read more