Merge remote-tracking branch 'upstream/pregmod-master' into pregmod-dev

src/gui/css/accordianStyleSheet.tw

@@ -71,3 +71,14 @@ button.accordion.active:before {
 	max-height: 0;
 	overflow: hidden;
 }
+
+div.accordion:before {
+	content: '\002B';
+	color: #777;
+	font-weight: bold;
+	float: left;
+	margin-right: 5px;
+}
+div.accordion.active:before {
+	content: "\2212";
+}

src/js/accordianJS.js

@@ -30,10 +30,19 @@ postdisplay["doAccordion"] = function (content) {
 		acc[i].onclick = function () {
 			this.classList.toggle("active");
 			var panel = this.nextElementSibling;
-			if (panel.style.maxHeight) {
-				panel.style.maxHeight = null;
-			} else {
-				panel.style.maxHeight = 2 * panel.scrollHeight + "px";
+			if(panel == null || panel == undefined){
+				panel = document.getElementById(this.id + "accHidden");
+				if( panel.style.display=='none' ){
+					panel.style.display = '';
+				}else{
+					panel.style.display = 'none';
+				}
+			}else{
+				if (panel.style.maxHeight) {
+					panel.style.maxHeight = null;
+				} else {
+					panel.style.maxHeight = 2 * panel.scrollHeight + "px";
+				}
 			}
 		};
 	}