A GOOD and versatile news manager needed

[mikeh]

You can write a rule in CSS http://u-la-la.ru/

That's exactly what I'm looking for but do not know how to do it.

#class-or-div-of-element-excerpt-is-in img {width:25%;height:auto} or {width:100px; height:auto} or {max-width:100px;height:auto}

Is the above something that would work for you?