// functions javascript routines


function expand_section(no)
{
    // collapse all back
    for(i=0; i<6; i++)
	if(i != no) 
        {
	    document.getElementById("section" + i).style.display = "none";
            document.getElementById("button" + i).style.display = "block";          
            document.getElementById("HLbutton" + i).style.display = "none";                   
        }
	
    // expand selected one 
    document.getElementById("section" + no).style.display = "block";    
    document.getElementById("button" + no).style.display = "none";          
    document.getElementById("HLbutton" + no).style.display = "block";                   
}