window.onload = function(){
	var allDT = document.getElementsByTagName("dt");
	for (var i = 0; i < allDT.length; i++) {
		allDT[i].onclick = showDD;
	} 	
 };
		
function showDD(){
	var showDD = "block";
	var showDT = "#040";
	var plusMinus = "minus";
	var allDD = this.parentNode.getElementsByTagName("dd");
	for (var num = 0; num < allDD.length; num++) {
		if (allDD[num].style.display == showDD){
			showDD = showDT = "";
			plusMinus = "plus";
		}
		allDD[num].style.display = showDD;
		this.parentNode.getElementsByTagName("dt")[0].style.color = showDT;
		this.parentNode.getElementsByTagName("dt")[0].style.backgroundImage = "url(../img/"+plusMinus+".gif)";
	}	
}