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border:1px solid Rgba (0,0,0,0.1) means that the bounding rectangle of the set element is 1 pixels wide, the solid line, and the color is expressed using RGBA.Where Rgba is an attribute in the CSS3,The first 3 digits of the RGBA brackets represent the RGB values of red green blue Three colors, 0-255, and the last one

it's better to invoke a script with void (0)or Several ways to open a new window link 1.window.open (' url ') 2. Use Custom function ------------------------------------------------------------------------------- If it is a #, there will be jumps to the top of the situation, the personal collection of several solutions: 1:2:3:4:5: -----------------------------------------------------

What is the use of * {margin: 0; padding: 0;} in the CSS of the webpage? marginpadding * The wildcard is used to match all elements on the page.* {Margin: 0; padding: 0;} As 2L said, b

Just like what is the difference between the following code {code...} and {code? Humbly ask the experts for advice, just like The following code Echo 'configuration error'; exit (3); // Status 3 indicates exit due to configuration error And // Exit directly ('configuration error '); What is the difference? I would lik

, and defines the action between objects, which is what can be done, so this is more suitable for developing large programsBut any tool is a double-edged sword (a chopper can kill or cut a dish)To understand programming, you have to understand variablesVariable (changing amount): I