function changeto(color1){
source=event.srcElement
if (source.tagName=="TR"||source.tagName=="TABLE")
return
while(source.tagName!="TD")
source=source.parentElement
if (source.style.backgroundColor!=color1&&source.id!="ignore")
source.style.backgroundColor=color1
}

function changeback(color2){
if (event.fromElement.contains(event.toElement)||source.contains(event.toElement)||source.id=="ignore")
return
if (event.toElement!=source)
source.style.backgroundColor=color2
}



var obj_curr = null; 

function expand(obj) 
{ 
var status = obj.getAttribute('status'); 
var target = obj.getAttribute('child'); 
var attrib = (status==''||status=='none')?'block':'none'; 
obj.setAttribute('status',attrib); 
c1.style.display = attrib; 
if(target!=null) 
{ 
obj.firstChild.src = "../images/" + status + ".gif"; 
} 
}