Hiding the left side panel on Sharepoint 2010

If you want to hide the left side panel in Sharepoint 2010, just go to your page and add the "Content Editor Web Part" and be sure you hide the panel with this CSS. To do it follow my steps.

1- Site Actions > Edit Page Insert > Web Part Media and Content select Content Editor and click Add

2- On the top of the page (be sure you select the "Content Editor Web Part") Format Text > HTML > Edit HTML Source

3- Add this CSS piece:

<style type="text/css"> 
  body #s4-leftpanel { display: none; } 
  .s4-ca { margin-left: 0px; } 
</style>

4- To "hide" the content editor web part ... Options > Web Part Properties > Appearance > Chrome Type > None  then click OK.