Complex wolframalpha ajax query

I want to write formulas in Mathematica format in my blog, inside tag's formula. What js should I use (and wh开发者_开发百科at libary), to replace those tag's, with http://www.wolframalpha.com/ search result image, when Dom gets loaded?

For example:

<formula>Limit[((3 + h)^(-1) + -1/3)/h, h -> 0]</formula>

gets replaced with:

If it's to complex or can not be done with javascript, please explain why.

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You need to use wolframalpha API service, but it's not free and you can't do this using javascript because of same origin policy, only using server-side language.

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It seems that your real question is: "how do I get nice math on Blogger.com", so I will answer this instead.

A proven solution (see e.g. Psychedelic Geometry, no affiliation) is to use the MathTex system by John Forkosh (who also hosts a public cgi) together with the ReplaceMath script by Randall Farmer. Browse some source for modified versions of the script.

Installation is a matter of including a single javascript file, after which you can inline LaTeX in your html as $latex <some LaTeX to be png'ified> $.

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If you want to format output from Wolfram Alpha then @antyrat is correct. But if you just want to write nice-looking mathematical expressions for your blog you should look at Presentation MathML and LaTeX. There is a variety of utilities for rendering LaTeX into gif or png or similar formats.