.home_content_left, .course_content_left
{
   float:left;
   height:100%;
   min-width:200px;	
   width:19%;
   
   display:inline;
}

.home_content_right, .course_content_right
{
   float:left;
   height:100%;

   min-width:780px;
   width:81%;

   margin-left:0px;
   
   background-color:aqua;
   min-height:inherit;
   max-height:inherit;
   
}