HTML code "collapse"

[tomcat73]

Hello all,

I am trying to adapt a HTML template into my own webpage. I want to change inline styles to a seperate style sheet.

Does anyone know what the property 'collapse' means within a table tage.

The code looks like this:

<table border="2" cellpadding="0" cellspacing="0" style="border-collapse: collapse; border-width: 2" bordercolor="#000080" width="100%" id="mainTable" height="125">

I have no idea what the collapse means or whether or not I need to use it in my external style sheet.

Any help would be great.

Thanks