function collapseAndExpand(section){
	
	var url = document.getElementById(section+"-hd").src;
	var imageUrl = url.substring(url.lastIndexOf("/")+1,url.length);
	
	if(imageUrl=="open_arrow.png"){		
		document.getElementById(section+"-hd").src="img/arrow_collapse.png";
		for(var id = 1; id ;id=id+1)
		{			
			if(document.getElementById(section+"-body-"+id))
			{			
				document.getElementById(section+"-body-"+id).style.display = "none";
			}
			else
			{			
				break;
			}				
		}	
	}
	else
	{		
		document.getElementById(section+"-hd").src="img/open_arrow.png"
		for(var id = 1; id ;id=id+1)
		{		
			if(document.getElementById(section+"-body-"+id)){			
				document.getElementById(section+"-body-"+id).style.display = "";
			}else{			
				break;
			}
						
		}	
	}	
}