how to hide the div with css code example

Example 1: hide element using css

#tinynav1
{
  display:none
}

Example 2: hide a div

<div id="main"> 
  <p> Hide/show this div </p>
</div>

('#main').hide(); //to hide

// 2nd way, by injecting css using jquery
$("#main").css("display", "none");