I presume you just posted the relevant code, because you are missing a lot of information:
1 – Doctype
2 – opening and closing<head> and <body> tags.
3 – You are also missing a closing div.
4 – You have given your table a width of 500px, there is no way you are going to fit that much information in 13 columns in such a small space without seriously reducing the size of your text. 12px and 16px for your headers will never fit, simple question of mathematics.
5 – To make it fit I reduced the sizes of your fonts to 10px and did the following
Code:
#tabla {
margin:20px 6px;
padding:0;
width:500px;
}
6 – #lateral could do with some padding the input box and text are jammed up against the left hand side.
