function getSubMenu(menu) {
	
	if (menu == 'home')
		{
		 document.getElementById('docSubmenu').style.display='none';
		 document.getElementById('newsSubmenu').style.display='none';
		 
		 document.getElementById('leftPic').src='images/leftside/coeus_bust.jpg' ;
		} 
		else if (menu =='docs') 
		{
		 document.getElementById('docSubmenu').style.display='block';
		 document.getElementById('newsSubmenu').style.display='none';
		 
		 document.getElementById('leftPic').src='images/leftside/knowledge_2.jpg';
		}
		else if (menu =='news')
		{
		 document.getElementById('docSubmenu').style.display='none';
		 document.getElementById('newsSubmenu').style.display='block';
		 
		 document.getElementById('leftPic').src='images/leftside/knowledge_1.jpg';
		}
		else 
		{
		 document.getElementById('docSubmenu').style.display='none';
		 document.getElementById('newsSubmenu').style.display='none';
		 
		  document.getElementById('leftPic').src='images/leftside/coeus_bust.jpg' ;
		}
	
}