Click your cursor at the bottom of the file and insert the following code:table.nospacing { border-spacing: 0; }table.nospacing th, td { padding: 0; } Click "File" and "Save" to save your CSS file.

It ought to. You might need to fool with the table's properties (in HTML, the cellspacing and cellpadding attributes, or in CSS, the table's padding and border-collapse properties).