diff --git a/deploy/build_js.sh b/deploy/build_js.sh
index 2db9862..b357855 100755
--- a/deploy/build_js.sh
+++ b/deploy/build_js.sh
@@ -4,8 +4,6 @@ ROOT=$(dirname $0)/../
 JSCOMP=$ROOT/third_party/jscomp/compiler.jar
 JSTARGET=$ROOT/ermac.min.js
 
-java -jar $JSCOMP --jscomp_off checkTypes --language_in ECMASCRIPT5_STRICT --js $ROOT/src_js/browser_chk.js > $JSTARGET
-
 cat $ROOT/src_js/third_party/jquery.min.js >> $JSTARGET
 
 java -jar $JSCOMP --jscomp_off checkTypes --language_in ECMASCRIPT5_STRICT --js $ROOT/src_js/third_party/jquery.tablesorter.js --compilation_level WHITESPACE_ONLY >> $JSTARGET
diff --git a/ermac b/ermac
deleted file mode 120000
index 80e52ce..0000000
--- a/ermac
+++ /dev/null
@@ -1 +0,0 @@
-./
diff --git a/example_dev.html b/example_dev.html
index 06b9744..92d3bef 100755
--- a/example_dev.html
+++ b/example_dev.html
@@ -8,7 +8,6 @@
 <script type="text/javascript">
 // a very simple env loader
 var to_load = [
-    'src_js/browser_chk.js',
     'src_js/third_party/jquery.min.js',
     'src_js/third_party/jquery.tablesorter.js',
     'src_js/third_party/wNumb.js',
diff --git a/src_js/browser_chk.js b/src_js/browser_chk.js
deleted file mode 100644
index a715e28..0000000
--- a/src_js/browser_chk.js
+++ /dev/null
@@ -1,36 +0,0 @@
-"use strict";
-
-var ie_passing_check = (function(){
-    var version = (function(){
-        var ua = window.navigator.userAgent;
-
-        var msie = ua.indexOf('MSIE ');
-        if (msie > 0){
-            return parseInt(ua.substring(msie + 5, ua.indexOf('.', msie)), 10);
-        }
-
-        var trident = ua.indexOf('Trident/');
-        if (trident > 0){
-            var rv = ua.indexOf('rv:');
-            return parseInt(ua.substring(rv + 3, ua.indexOf('.', rv)), 10);
-        }
-
-        var edge = ua.indexOf('Edge/');
-        if (edge > 0){
-            return parseInt(ua.substring(edge + 5, ua.indexOf('.', edge)), 10);
-        }
-
-        return false;
-    })();
-
-    if (!version) return true;
-
-    if (version < 12) return false;
-
-    return true;
-}());
-
-if (!ie_passing_check){
-    alert("Please, upgrade your browser");
-    throw new Error("Unsupported user agent");
-}
diff --git a/src_js/events.js b/src_js/events.js
index c9be3fa..f7a5bac 100755
--- a/src_js/events.js
+++ b/src_js/events.js
@@ -485,6 +485,10 @@ function register_events(){
     });
 
     $('#close_ss_dialogue').click(function(){
+
+        $('#ss_custom_box, #overlay').hide();
+        $('div.ss_col > ul').empty();
+
         var x_sort = $('#ss_x > ul > li.ss_x').attr('rel').split('_')[1],
             y_sort = $('#ss_y > ul > li.ss_y').attr('rel').split('_')[1],
             x_op = $('#sops_x > ul > li.sops_x').text(),
@@ -528,8 +532,6 @@ function register_events(){
 
             document.getElementById('visavis_iframe').contentWindow.matrix_order(x_sort, y_sort, x_op, y_op);
         }
-        $('#ss_custom_box, #overlay').hide();
-        $('div.ss_col > ul').empty();
     });
 
     $('#close_dc_dialogue').click(function(){
diff --git a/src_js/markup.js b/src_js/markup.js
index dd7b1f3..a778d4f 100755
--- a/src_js/markup.js
+++ b/src_js/markup.js
@@ -341,7 +341,7 @@ function register_html(){
 
     <ul>
         <li id="visualize" class="wmbutton">Visualize</li>
-        <li id="xrpdize" class="wmbutton">Get XRPD</li>
+        <li id="xrpdize" class="wmbutton">Show XRPD</li>
         <li id="absolidize" class="wmbutton"><span class="active">Simulate</span><span class="disabled">Added to <span class="href">my data</span>.</span></li>
         <li id="download_pdf" class="d_icon"><a rel="pdf" href="#" target="_blank" title="Get HTML / PDF document" rel="nofollow"></a></li>
         <li id="download_json" class="d_icon"><a rel="json" href="#" target="_blank" title="Get machine-readable JSON file" rel="nofollow"></a></li>
diff --git a/src_js/wmsettings.js b/src_js/wmsettings.js
index c380088..74fd332 100755
--- a/src_js/wmsettings.js
+++ b/src_js/wmsettings.js
@@ -147,13 +147,13 @@ wmgui.path_s_xrpd = '#' + wmgui.api_host + '/download/s?fmt=xrpd&q=';
 wmgui.path_sd_plot = '#' + wmgui.api_host + '/download/p?fmt=json&q=';
 
 wmgui.engines_addrs = {
-    'cifplayer': '/ermac/webassets/iframe_cifplayer.html', // FIXME
-    'visavis': '/ermac/webassets/iframe_visavis.html' // FIXME
+    'cifplayer': '/webassets/iframe_cifplayer.html',
+    'visavis': '/webassets/iframe_visavis.html'
 }
 
-wmgui.v_pd_user_addr =    wmgui.static_host + '/pd_stub.html#';
-wmgui.v_ab_vis_addr =     '/ermac/labs/view-phonons/#' + wmgui.api_host + '/download/p?fmt=json&q='; // FIXME
-wmgui.v_pd_3d_addr =      '/ermac/labs/pd3d/?'; // FIXME
+wmgui.v_pd_user_addr = '/webassets/pd_stub.html#';
+wmgui.v_ab_vis_addr =  '/labs/view-phonons/#' + wmgui.api_host + '/download/p?fmt=json&q=';
+wmgui.v_pd_3d_addr =   '/labs/pd3d/?';
 
 // remote files commonly used
 wmgui.client_data_addr =  wmgui.static_host + '/wmdata.json?220923';
diff --git a/webassets/ermac.css b/webassets/ermac.css
index 59f3ad3..d29db80 100755
--- a/webassets/ermac.css
+++ b/webassets/ermac.css
@@ -7,7 +7,7 @@ sup, sub{font-size:12px;}
 .sky{background:#fff;}
 #overlay{position:fixed;left:0;top:0;width:100%;height:100%;text-align:center;z-index:100;overflow:hidden;background:#fff;opacity:0.9;}
 #visavis{display:none;z-index:50;position:fixed;top:56px;left:50%;margin-left:-36%;width:72%;height:99%;background:#fff;}
-.wmbutton{cursor:pointer;user-select:none;font-size:1.3em;text-align:center;border:1px solid #999;background:#999;color:#fff;line-height:1.4em;border-radius:2px;text-decoration:none;box-shadow:inset 0 2px 2px rgba(255,255,255,0.3), inset 0 -2px 2px rgba(0,0,0,0.3), inset 0 20px 10px rgba(255,255,255,0.3), 0 0 2px 1px rgba(0,0,0,0.2), 0 2px 2px rgba(0,0,0,0.3);}
+.wmbutton{cursor:pointer;user-select:none;font-size:1.25em;text-align:center;border:1px solid #999;background:#999;color:#fff;line-height:1.4em;border-radius:2px;text-decoration:none;box-shadow:inset 0 2px 2px rgba(255,255,255,0.3), inset 0 -2px 2px rgba(0,0,0,0.3), inset 0 20px 10px rgba(255,255,255,0.3), 0 0 2px 1px rgba(0,0,0,0.2), 0 2px 2px rgba(0,0,0,0.3);}
 .wmbutton:hover{box-shadow:inset 0 2px 2px rgba(255,255,255,0.2), inset 0 -2px 2px rgba(0,0,0,0.2), inset 0 20px 10px rgba(255,255,255,0.2), 0 0 2px 1px rgba(0,0,0,0.2), 0 2px 2px rgba(0,0,0,0.2);}
 .wmbutton:active{transform:translateY(1px);}
 .wmbutton.disabled{cursor:not-allowed;box-shadow:none;background:#eee !important;border-color:#eee !important;}
@@ -232,13 +232,12 @@ div.col_title a{text-decoration:none;color:#000;border-bottom:1px solid #000;}
 #ctx_col > ul{margin:0;padding:0;}
 #ctx_col > ul > li{list-style:none;width:80px;height:96px;margin:0 auto;display:block;}
 #ctx_col > ul > li > a{display:block;width:100%;height:100%;}
-#visualize{width:110px !important;height:30px !important;text-align:center;line-height:30px;margin:14px auto !important;}
-#xrpdize{width:110px !important;height:30px !important;text-align:center;line-height:30px;margin:14px auto !important;border:1px solid #acc2b3;background:#acc2b3;}
-#absolidize{width:140px !important;height:30px !important;text-align:center;line-height:30px;margin:14px auto !important;}
+#visualize{width:138px !important;height:30px !important;text-align:center;line-height:30px;margin:14px auto !important;}
+#xrpdize{width:138px !important;height:30px !important;text-align:center;line-height:30px;margin:14px auto !important;border:1px solid #acc2b3;background:#acc2b3;}
+#absolidize{width:138px !important;height:30px !important;text-align:center;line-height:30px;margin:14px auto !important;}
 #absolidize > span.active{display:none;}
 #absolidize > span.disabled{display:block;}
 #absolidize > span.disabled > i{color:green;font-size:30px;}
-#absolidize.wmbutton{color:#fff;border:1px solid #555;background:#555;}
 #absolidize.wmbutton > span.active{display:block;}
 #absolidize.wmbutton > span.disabled{display:none;}
 #download_cif{background:url(icons.png) 0 5px no-repeat;}
diff --git a/webassets/iframe_visavis.html b/webassets/iframe_visavis.html
index 554f009..32b875b 100644
--- a/webassets/iframe_visavis.html
+++ b/webassets/iframe_visavis.html
@@ -119,7 +119,7 @@
 
     document.getElementById('switcher').onclick = function(){
         /* FIXME: REFACTOR */
-        window.location = '/pd_stub.html#' + window.location.hash.substr(1).replace('fmt=json', 'fmt=png');
+        window.location = '/webassets/pd_stub.html#' + window.location.hash.substr(1).replace('fmt=json', 'fmt=png');
     }
 })();
 </script>
diff --git a/webassets/pd_stub.html b/webassets/pd_stub.html
new file mode 100644
index 0000000..7b216c8
--- /dev/null
+++ b/webassets/pd_stub.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8" />
+<meta http-equiv="X-UA-Compatible" content="IE=Edge" />
+<style>
+*{margin:0;padding:0;}
+html, body{height:100%;user-select:none;}
+body{background-size:contain;background-repeat:no-repeat;background-position:center center;}
+
+#switcher{position:fixed;top:10px;left:10px;width:40px;height:40px;z-index:10;cursor:pointer;background:url(data:image/gif;base64,R0lGODlhHgAXAIABAAAAAP///yH5BAEKAAEALAAAAAAeABcAAAJVjA0Jx63bzkuRTegorXapjHHiJ23iaAbkya1qyFamG0ckXXcQniNb2su8do/TxHdJhpTMpvMJhbaS06LsByxZbViYdvtFeovgssv61DG/F67SzWOHCgA7) center center no-repeat;border:2px solid #ff8400;border-radius:25px;}
+#switcher:hover{transform:rotate(180deg);}
+</style>
+</head>
+<body>
+
+<div id="cross" title="Close"></div>
+<div id="switcher" title="Show interactive plot (experimental feature)"></div>
+
+<script type="text/javascript">
+if (document.location.hash.length){
+    var pic_url = document.location.hash.substr(1);
+    document.body.style.backgroundImage = "url('" + pic_url + "')";
+
+    document.getElementById('switcher').onclick = function(){
+        window.location = '/webassets/iframe_visavis.html#' + pic_url.replace('fmt=png', 'fmt=json');
+    }
+}
+</script>
+</body>
+</html>