* {
margin: 0;
padding: 0;
}
html, body {
height: 100%;
}

body {
background-color: #f5f5f5;
}

#wrap {
background-color: white;
min-height: 100%;
position: relative;
    min-width: 700px;
}

#header {
height: 100px;
background-color: #ddd;
}

#content {
padding-bottom: 50px;
overflow: hidden;
}
#leftcol {
    width: 20%;
    float: left;
}

#centercol {
    overflow: hidden;
}

#rightcol {
width: 20%;
float: right;
}

#main {
overflow: hidden;
}

#footer {
height: 50px;
background-color: #ddd;
position: absolute;
bottom: 0;
width: 100%;
}

.content {
padding: 15px;
}