Make JS IE friendly

replace startsWith and optional function arguments with IE friendly code

Author: twhiteaker

pagination.js

@@ -19,7 +19,7 @@ function makePageLink(currentUrl, currentStart, start, linkText) {
     var tagStart = '<a href="';
     if (currentStart == start) {
         uri = "#";
-        if (!linkText.toString().startsWith("&")) {  // Don't modify arrows
+        if (!linkText.toString().substring(0, 1) === "&") {  // Don't modify arrows
             tagStart = '<a class="active" href="';
         }
     }

zotero.js

@@ -98,10 +98,11 @@ function showUrl(url) {
 
 
 // Passes search URL and callbacks to CORS function
-function searchZotero(query, publicGroupId, start=0) {
+function searchZotero(query, publicGroupId, start) {
     var base = "https://api.zotero.org/groups/";
     var params = "/items?v=3&include=bib&sort=date&itemType=-attachment&q=";
     var limit = "&limit=" + ZOTERO_CONFIG["limit"];
+    if (start === undefined) start = "0";
     start = "&start=" + start;
     var url = base + publicGroupId + params + query + limit + start;
     showUrl(url);