Auto adjust divs height to fill up the remaining space

[Norton]

I have 2 \[code\]div\[/code\]s. I gave the first one a \[code\]height\[/code\] of \[code\]70px\[/code\] and now I want the 2nd \[code\]div\[/code\] to fill up the remaining space of the webpage. This should be relative to the first div. Below is my code: (The 2 \[code\]div\[/code\]s are \[code\]header\[/code\] and \[code\]content\[/code\])\[code\]* { margin: 0px; padding: 0px;}#header { background-color: #1874CD; width: 100%; height: 70px;}#name { color: #ffffff; padding: 10px 10px 10px 10px; font-size: 35px; font-weight: bold; font-family: Calibri;}#content { background-color: #F5F5F5; width: 100%; height: 650px;}\[/code\]