function showHideArea(area, t, type, s, h){
	if(document.getElementById(area)){
		var area_main = "none";
		if("none" == document.getElementById(area).style.display){
			var area_main = "block";
		}
		document.getElementById(area).style.display = area_main;

		if(t && t.innerHTML){
			if(undefined == s) var s = "+";
			if(undefined == h) var h = "-";
			var btnstr = s;
			if("block" == area_main) var btnstr = h;
			if(type && "IMG" == t.firstChild.tagName){
				var dirname = t.firstChild.src.replace(/\\/g,"/").replace(/\/[^\/]*$/, "")+"/";
				t.firstChild.src = dirname+btnstr;
			}
			else{
				t.innerHTML = btnstr;
			}
		}

	}
}