Experienced Webdesigners/Programmers!

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the situation is someone who has a product website (sort of like ecommerce).. what is the easiest way to update their products & descriptions on their page on a daily basis? Is there a way to do this without learning a different type of code such as php? I guess what I want to know is what application do i need in order to see a preview of the website in front of me with the option of "clicking" and changing the content such as pictures & descriptions and make it available for my visitors within minutes?