var plus = new Image();
    plus.src="http://www.americanlegacy.org/Structural_images/icon-expand.gif";
    var minus = new Image();
    minus.src="http://www.americanlegacy.org/Structural_images/icon-collapse.gif";   
    
    function ExpandCollapse(section_num) //node 
    {
        //var plus_minus_img = node.firstChild;
        //var section = node.parentNode.nextSibling.childNodes[1]; //dynamic content section
        var closed_section = document.getElementById("ExpandCollapseClosed_" + section_num);
        var open_section = document.getElementById("ExpandCollapseOpen_" + section_num);
        
        var plus_minus_img  = document.getElementById("pm_" + section_num);
        var x_scroll = plus_minus_img.x;
        var y_scroll = plus_minus_img.y;
           
        //alert("open_section.style.display=" + open_section.style.display);    
        //alert("closed_section.style.display=" + closed_section.style.display); 
        if (open_section.style.display == "none") {
            open_section.style.display = "block";
            closed_section.style.display = "none";
            plus_minus_img.src = minus.src;
        }
        else {
            open_section.style.display = "none";
            closed_section.style.display = "block";
            plus_minus_img.src = plus.src;
        } 
        //window.scrollTo(x_scroll, y_scroll); //restor the scroll position
    }
    function ExpandAll()
    {
        var imgs = document.getElementsByTagName("img");
        var divs = document.getElementsByTagName("div");
        var img_ptrn = /^ExpandCollapse/;
        var closed_div_ptrn = /^ExpandCollapseClosed/; 
        var open_div_ptrn = /^ExpandCollapseOpen/;
                    
        for (var i=0; i<imgs.length; i++) {
            if(imgs[i].className.match(img_ptrn)) {
                imgs[i].src = minus.src;
            }
        }
        
        for (var i=0; i<divs.length; i++) {
            if(divs[i].className.match(closed_div_ptrn)) {
                divs[i].style.display = "none";
            }
            if(divs[i].className.match(open_div_ptrn)) {
                divs[i].style.display = "block";
           }            
        }
    }
    
    function CollapseAll()
    {
        var imgs = document.getElementsByTagName("img");
        var divs = document.getElementsByTagName("div");
        var img_ptrn = /^ExpandCollapse/;
        var closed_div_ptrn = /^ExpandCollapseClosed/; 
        var open_div_ptrn = /^ExpandCollapseOpen/;
                    
        for (var i=0; i<imgs.length; i++) {
            if(imgs[i].className.match(img_ptrn)) {
                imgs[i].src = plus.src;
            }
        }
        
        for (var i=0; i<divs.length; i++) {
            if(divs[i].className.match(closed_div_ptrn)) {
                divs[i].style.display = "block";
            }
            if(divs[i].className.match(open_div_ptrn)) {
                divs[i].style.display = "none";
           }            
        }
    }