var previous_id = null;

function doShow(id) {
	which = document.getElementById(id + "out").style.display;	

	if (which == "" || which == "none") { 
		document.getElementById(id + "out").style.display = "block";
		document.getElementById("click_area_"+ id).style.backgroundColor = "#000000";
		document.getElementById("click_image_"+ id).src = "image/close.gif";
		document.getElementById("year_"+ id).style.backgroundColor = "#000000";
		document.getElementById("year_" + id).className = "text_link_blue";
		document.getElementById("name_" + id).style.backgroundColor = "#000000";
		document.getElementById("name_" + id).className = "text_link_blue";
		document.getElementById("type_" + id).style.backgroundColor = "#000000";
		document.getElementById("type_" + id).className = "text_link_blue";
		document.getElementById("discipline_"  +id).style.backgroundColor = "#000000";
		document.getElementById("discipline_"  +id).className = "text_link_blue";
		
		
		if(previous_id != null){
			document.getElementById(previous_id + "out").style.display = "none";
			document.getElementById("click_area_"+ previous_id).style.backgroundColor = "#FFFFFF";
			document.getElementById("click_image_"+ previous_id).src = "image/open.gif";			
			document.getElementById("year_"+ previous_id).style.backgroundColor = "#FFFFFF";
			document.getElementById("year_" + previous_id).className = "text_red";
			document.getElementById("name_" + previous_id).style.backgroundColor = "#FFFFFF";
			document.getElementById("name_" + previous_id).className = "text_link_black";
			document.getElementById("type_" + previous_id).style.backgroundColor = "#FFFFFF";
			document.getElementById("type_" + previous_id).className = "text_link_black";
			document.getElementById("discipline_" + previous_id).style.backgroundColor = "#FFFFFF";
			document.getElementById("discipline_"  + previous_id).className = "text_link_black";
		}	
		
		this.previous_id = id;
	}
	else {  
		document.getElementById(id + "out").style.display = "none";
		document.getElementById("click_area_"+ id).style.backgroundColor = "#FFFFFF";
		document.getElementById("click_image_"+ id).src = "image/open.gif";
		document.getElementById("year_"+ id).style.backgroundColor = "#FFFFFF";
		document.getElementById("year_" + id).className = "text_red";
		document.getElementById("name_" + id).style.backgroundColor = "#FFFFFF";
		document.getElementById("name_" + id).className = "text_link_black"
		document.getElementById("type_" + id).style.backgroundColor = "#FFFFFF";
		document.getElementById("type_" + id).className = "text_link_black";
		document.getElementById("discipline_" + id).style.backgroundColor = "#FFFFFF";
		document.getElementById("discipline_"  + id).className = "text_link_black";		
		this.previous_id = null;	
	}	
}

function change(id) {
	 id.style.backgroundColor = "#F7F7F7";
	 id.style.cursor="hand";
	 naam = id.id;
	 num = naam.substring(4)
	 document.getElementById("div"+num).style.visibility="visible";
}
function change_back(id) {
	id.style.backgroundColor = "#F2F2F2";
	naam = id.id;
	num = naam.substring(4)
	document.getElementById("div"+num).style.visibility="hidden";
}