// :: summary :: //

var summary_state = new Array() ;

for (var t = 0 ; t < 10 ; t++)
{
	summary_state[t] = 0 ;
}

function summary (num)
{
	if (summary_state[num - 1] == 0)
	{
		document.getElementById("layer_left_articles_" + num).style.display = "block" ;
		summary_state[num - 1] = 1 ;
	}
	else
	{
		document.getElementById("layer_left_articles_" + num).style.display = "none" ;
		summary_state[num - 1] = 0 ;
	}	
}