Uses CSS positions instead of margins to position item bars.

Fixes #13.

Author: usmonster

css/style.css

@@ -105,6 +105,7 @@
     background-image: url(../img/grid.png);
     background-repeat: repeat;
     background-position: 24px 24px;
+    position: relative;
 }
 .fn-gantt .day, .fn-gantt .date {
     overflow: visible;

js/jquery.fn.gantt.js

@@ -1033,7 +1033,7 @@
                                     var topEl = $(element).find("#rowheader" + i);
 
                                     var top = tools.getCellSize() * 5 + 2 + parseInt(topEl.attr("offset"), 10);
-                                    _bar.css({ 'margin-top': top, 'margin-left': Math.floor(cFrom) });
+                                    _bar.css({ 'top': top, 'left': Math.floor(cFrom) });
 
                                     datapanel.append(_bar);
                                     break;
@@ -1076,7 +1076,7 @@
                                     var topEl = $(element).find("#rowheader" + i);
 
                                     var top = tools.getCellSize() * 3 + 2 + parseInt(topEl.attr("offset"), 10);
-                                    _bar.css({ 'margin-top': top, 'margin-left': Math.floor(cFrom) });
+                                    _bar.css({ 'top': top, 'left': Math.floor(cFrom) });
 
                                     datapanel.append(_bar);
                                     break;
@@ -1116,7 +1116,7 @@
                                     var topEl = $(element).find("#rowheader" + i);
 
                                     var top = tools.getCellSize() * 2 + 2 + parseInt(topEl.attr("offset"), 10);
-                                    _bar.css({ 'margin-top': top, 'margin-left': Math.floor(cFrom) });
+                                    _bar.css({ 'top': top, 'left': Math.floor(cFrom) });
 
                                     datapanel.append(_bar);
                                     break;
@@ -1142,7 +1142,7 @@
                                     var topEl = $(element).find("#rowheader" + i);
 
                                     var top = tools.getCellSize() * 4 + 2 + parseInt(topEl.attr("offset"), 10);
-                                    _bar.css({ 'margin-top': top, 'margin-left': Math.floor(cFrom) });
+                                    _bar.css({ 'top': top, 'left': Math.floor(cFrom) });
 
                                     datapanel.append(_bar);