Howto get rid of the sidebars?

[nitramf]

Thank you for the information. Which files I have to modify if I want the complete page fullsize? Like youtube.

[buyscripts]

Edit stlye.css and modify same as below

#wrapper {
background-color:#FFFFFF;
margin:0 auto;
min-width:100%;
padding:0;
text-align:left;
width:100%;
}