[timenetvoiptest]-improve chat room draggable using jquery

www/client.js

@@ -627,8 +627,8 @@ function setChatBoxMobile() {
     document.documentElement.style.setProperty("--msger-height", "98vh");
     document.documentElement.style.setProperty("--msger-width", "98vw");
   } else {
-    // make chat room draggable for desktop
-    dragElement(get("msgerDraggable"));
+    // make chat room draggable for desktop https://jqueryui.com/draggable/
+    $("#msgerDraggable").draggable();
   }
 }
 
@@ -742,54 +742,6 @@ function showChatRoom() {
   }
 }
 
-// =====================================================
-// drag char room element
-// =====================================================
-function dragElement(elmnt) {
-  // https://www.w3schools.com/howto/howto_js_draggable.asp
-  var pos1 = 0,
-    pos2 = 0,
-    pos3 = 0,
-    pos4 = 0;
-  if (get("msgerHeader")) {
-    /* if present, the header is where you move the DIV from:*/
-    get("msgerHeader").onmousedown = dragMouseDown;
-  } else {
-    /* otherwise, move the DIV from anywhere inside the DIV:*/
-    elmnt.onmousedown = dragMouseDown;
-  }
-
-  function dragMouseDown(e) {
-    e = e || window.event;
-    e.preventDefault();
-    // get the mouse cursor position at startup:
-    pos3 = e.clientX;
-    pos4 = e.clientY;
-    document.onmouseup = closeDragElement;
-    // call a function whenever the cursor moves:
-    document.onmousemove = elementDrag;
-  }
-
-  function elementDrag(e) {
-    e = e || window.event;
-    e.preventDefault();
-    // calculate the new cursor position:
-    pos1 = pos3 - e.clientX;
-    pos2 = pos4 - e.clientY;
-    pos3 = e.clientX;
-    pos4 = e.clientY;
-    // set the element's new position:
-    elmnt.style.top = elmnt.offsetTop - pos2 + "px";
-    elmnt.style.left = elmnt.offsetLeft - pos1 + "px";
-  }
-
-  function closeDragElement() {
-    /* stop moving when mouse button is released:*/
-    document.onmouseup = null;
-    document.onmousemove = null;
-  }
-}
-
 // =====================================================
 // append Message to msger chat room
 // =====================================================