function collapseExpand(id) {   
    var i=0;   
    var xpand = false;   
    for(i=0; i<document.getElementsByName('LinksTreeData' + id).length; i++)   
    {   
    if (navigator.appName == "Netscape") { 
           if (document.getElementsByName('LinksTreeData' + id)[i].style.display == 'none' || document.getElementsByName('LinksTreeData' + id)[i].style.visibility == 'collapse')   
           {   
                  xpand = true; 
	               document.getElementsByName('LinksTreeData' + id)[i].style.visibility = '';   
	               document.getElementsByName('LinksTreeData' + id)[i].style.display = '';   
           }   
           else   
           {                    xpand = false; 
                 document.getElementsByName('LinksTreeData' + id)[i].style.visibility = 'collapse';  
           }   
   }  else {  
           if (document.getElementsByName('LinksTreeData' + id)[i].style.display == '' || document.getElementsByName('LinksTreeData' + id)[i].style.display == 'none')   
           {   
                   xpand = true; 
	                document.getElementsByName('LinksTreeData' + id)[i].style.display = 'block';   
           }   
           else   
           {                      xpand = false; 
                   document.getElementsByName('LinksTreeData' + id)[i].style.display = 'none';  
           }   
    }   
    }   
    if (xpand == true)   
        document.getElementsByName('LinksTreeArrow' + id)[0].src = '../images/expanded.gif'; 
    else   
        document.getElementsByName('LinksTreeArrow' + id)[0].src = '../images/collapsed.gif'; 
}