What is the easiest and most reliable way to have a constant height send button with rounded corners?

Question

Constant height, so only left / right images are needed instead of 4+, right? I still need a top-down color gradient (and another one by introduction).

If possible, I would prefer that he was also <input type='submit'>not something strange.

Is there a way (website / imagemagick script, etc.) to automatically create these images or need to draw them in some graphics program?

Answer 1

Here is a site that will let you create them: http://www.iwebtoolsonline.com/html-and-css-rounded-corner-button-generator