function ToggleDisplay(el,disp)
{
  	if(!disp)
  		disp='block';
	var element=document.getElementById(el);
	if(!element)  
		return;
	if(element.style.display=='none')
		element.style.display=disp;
	else
		element.style.display='none';
}

function SetDisplay(el,disp)
{
  	if(!disp)
  		disp='block';
	var element=document.getElementById(el);
	if(!element)  
		return;
	element.style.display=disp;
}

var cur_post;
function ExpandPost(el)
{
	ToggleDisplay(el);
	if(cur_post)
		SetDisplay(cur_post,'none');

	var element=document.getElementById(el);
	if(!element)  
		return;
	if(element.style.display!='none')
		cur_post=el;  
	else
		cur_post='';
}