使用Flot jQuery插件显示带有正确时区的工具提示

\'mode: \"time\"\'

 [1300087800000,29],
 [1300088700000,39],
 [1300089600000,46],
 [1300090500000,53],
 [1300091400000,68],
 [1300092300000,95],
 ...

$(placeholder).bind(\"plothover\", function (event, pos, item) {
     $(\"#tooltip\").remove();

     var x = item.datapoint[0].toFixed(2);
     var y = item.datapoint[1].toFixed(2);

     var currDate   = new Date(Math.floor(x));
     var hour       = currDate.getHours();
     var minute     = String(\"\") + currDate.getMinutes();

     var tooltip = hour + \":\" +
                   ((minute.length < 2) ? \"0\" + minute : minute) + \" \" +
                   (Math.round(y * 100)/100) + \"Wh\"
     showTooltip(item.pageX, item.pageY, tooltip);
 });  

 var plotOptions = {  
     lines:  { show: true, lineWidth: 1 },  
     points: { show: false, symbol: \"cross\" },  
     xaxis:  {  
         mode:   \"time\",  
         tickLength: 5,  
         timeZoneOffset: (new Date()).getTimezoneOffset()  
     },  
     selection: { mode: \"x\", color: \"#BCBCBC\" },
     grid:      { hoverable: true, clickable: false }
};

timeZoneOffset