diff --git a/public/javascripts/site_update.js b/public/javascripts/site_update.js
new file mode 100644
--- /dev/null
+++ b/public/javascripts/site_update.js
@@ -0,0 +1,32 @@
+function updateSiteList() {
+    currentCountry = document.getElementById("site_country_id").value;
+
+    sites = siteList[currentCountry];
+    siteSelect = document.getElementById("login_site_id");
+    old_len = siteSelect.length;
+    // clear old box
+    for(i=0; i<old_len; i++) siteSelect.remove(0);
+    
+    if(currentCountry==0) {
+	for(i=0; i<allSiteList.length; i++) {
+	    if(allSiteList[i]!=null) {
+		try {
+		    siteSelect.add(new Option(allSiteList[i],""+i,false,false),null);
+		} catch(ex) {
+		    siteSelect.add(new Option(allSiteList[i],""+i,false,false));
+		}
+	    }
+	}
+    } else {
+	for(i=0; i<sites.length; i++) {
+	    if(sites[i]!=null) {
+		try {
+		    siteSelect.add(new Option(sites[i],""+i,false,false),null);
+		} catch(ex) {
+		    siteSelect.add(new Option(sites[i],""+i,false,false));
+		}
+	    }
+	}
+    }
+}
+ 
\ No newline at end of file