diff --git a/admin/index.html b/admin/index.html
index 15c4810f..3a27167a 100644
--- a/admin/index.html
+++ b/admin/index.html
@@ -44,7 +44,6 @@
 
 <!-- jQuery and Bootstrap -->
 <script src="js/jquery/jquery-2.2.4.min.js"></script>
-<script src="js/jc/jc.jsextend.js"></script>
 <script src="js/jquery/jquery.panzoom.min.js"></script>
 <script src="js/plugins/jquery-ui/jquery-ui.min.js"></script>
 <script src="js/bootstrap/bootstrap.min.js"></script>
diff --git a/admin/js/jc/jc.jsextend.js b/admin/js/jc/jc.jsextend.js
deleted file mode 100644
index 8e70199a..00000000
--- a/admin/js/jc/jc.jsextend.js
+++ /dev/null
@@ -1,157 +0,0 @@
-var STARTHOUR = 6;
-var STARTMINUTE = 30;
-
-if (!String.prototype.format) {
-    String.prototype.format = function() {
-        var formatted = this;
-        for (var i = 0; i < arguments.length; i++) {
-            var regexp = new RegExp('\\{'+i+'\\}', 'gi');
-            formatted = formatted.replace(regexp, arguments[i]);
-        }
-        return formatted;
-    };
-}
-
-if (!Object.entries)
-  Object.entries = function( obj ){
-    var ownProps = Object.keys( obj ),
-        i = ownProps.length,
-        resArray = new Array(i); // preallocate the Array
-    while (i--)
-      resArray[i] = [ownProps[i], obj[ownProps[i]]];
-    
-    return resArray;
-};
-
-function getFormat(period){
-	switch(period){
-		case 'day':
-			return "YYYY-MM-DD";
-			break;
-		case 'hour':
-			return "YYYY-MM-DD HH:mm";
-			break;
-		case 'month':
-			return "YYYY-MM";
-			break;
-		case 'year':
-			return "YYYY";
-			break;
-	}
-}
-
-function getChartFormat(period){
-	switch(period){
-		case 'day':
-			return '%m-%d';
-			break;
-		case 'hour':
-			return '%m-%d %H:%M';
-			break;
-		case 'month':
-			return '%Y-%m';
-			break;
-		case 'year':
-			return '%Y';
-			break;
-	}
-}
-
-function saveAs(uri, filename) {
-  var link = document.createElement('a');
-  if (typeof link.download === 'string') {
-    link.href = uri;
-    link.download = filename;
-
-    //Firefox requires the link to be in the body
-    document.body.appendChild(link);
-    
-    //simulate click
-    link.click();
-
-    //remove the link when done
-    document.body.removeChild(link);
-  } else {
-    window.open(uri);
-  }
-}
-
-
-function SaveToDisk(blobURL, fileName) {
-    var reader = new FileReader();
-    reader.readAsDataURL(blobURL);
-    //reader.readAsBinaryString(blobURL);
-    //reader.readAsArrayBuffer(blobURL)
-    reader.onload = function(event) {
-        var save = document.createElement('a');
-        save.href = event.target.result;
-        save.download = fileName || 'unknown file';
-
-        save.style = 'display:none;opacity:0;color:transparent;';
-        (document.body || document.documentElement).appendChild(save);
-
-        if (typeof save.click === 'function') {
-            save.click();
-        } else {
-            save.target = '_blank';
-            var event = document.createEvent('Event');
-            event.initEvent('click', true, true);
-            save.dispatchEvent(event);
-        }
-
-        (window.URL || window.webkitURL).revokeObjectURL(save.href);
-    };
-}
-
-function compareRange(start, end, start2, end2) {
-    var period = "day", range1, range2;
-    if (start.length < 5) {
-        start = start + '-01-01';
-        end = end + '-01-01';
-        period = "year";
-    } else if (start.length < 8) {
-        start = start + '-01';
-        end = end + '-01';
-        period = "month";
-    } else if (start.length < 11) {
-
-    } else if (start.length < 20) {
-        start = start.replace("-", "/").replace("T", " ");
-        startNumber = new Date(start).getTime();
-        end = end.replace("-", "/").replace("T", " ");
-        endNumber = new Date(end).getTime();
-        start2 = start2.replace("-", "/").replace("T", " ");
-        startNumber2 = new Date(start2).getTime();
-        end2 = end2.replace("-", "/").replace("T", " ");
-        endNumber2 = new Date(end2).getTime();
-        console.log(startNumber);
-        return (endNumber2-endNumber)==(startNumber2-startNumber)?true:false;
-    }
-    
-    if(start2.length<5){
-        start2=start2+'-01-01';
-        end2 =end2+'-01-01';
-    }else if(start2.length<8){
-        start2=start2+'-01';
-        end2 =end2+'-01';
-    }
-    
-    start = new Date(start.replace("-", "/").replace("-","/"));
-    end = new Date(end.replace("-", "/").replace("-","/"));
-    start2 = new Date(start2.replace("-", "/").replace("-","/"));
-    end2 = new Date(end2.replace("-", "/").replace("-","/"));
-
-    if(period=="day"){
-        range1=end-start;
-        range2=end2-start2;
-    }else if(period=='month'){
-        range1=(end.getFullYear()-start.getFullYear())*12+(end.getMonth()-start.getMonth());
-        range2=(end2.getFullYear()-start2.getFullYear())*12+(end2.getMonth()-start2.getMonth());
-    }else if(period=="year"){
-        range1=end.getFullYear()-start.getFullYear();
-        range2=end2.getFullYear()-start2.getFullYear();
-    }
-
-    
-    return range1==range2?true:false;
-}