$(function () {var isMouseDown = false;var currentTh = null;
 $('table th').bind({
 mousedown:function (e) { var $th = $(this); var left = $th.offset().left; //元素距左 var rightPos = left + $th.outerWidth(); if (rightPos-4<= e.pageX && e.pageX <= rightPos) {
 isMouseDown = true;
 currentTh = $th;
 $('table th').css('cursor','e-resize'); //創建遮罩層，防止mouseup事件被其它元素阻止冒泡，導致mouseup事件無法被body捕獲，導致拖動不能停止 var bodyWidth = $('body').width(); var bodyHeight = $('body').height();
 $('body').append('<div id="mask" style="opacity:0;top:0px;left:0px;cursor:e-resize;background-color:green;position:absolute;z-index:9999;width:'+bodyWidth+'px;height:'+bodyHeight+'px;"></div>');
 }
 }
 
 });

 $('body').bind({
 mousemove:function(e) { //移動到column右邊緣提示 $('table th').each(function (index,eleDom) { var ele = $(eleDom); var left = ele.offset().left; //元素距左 var rightPos = left + ele.outerWidth(); if (rightPos-4<= e.pageX && e.pageX <= rightPos) { //移到列右邊緣 ele.css('cursor','e-resize');
 }else{ if(!isMouseDown){ //不是鼠標按下的時候取消特殊鼠標樣式 ele.css("cursor","auto");
 }
 }
 }); //改變大小 if(currentTh != null){ if(isMouseDown){ //鼠標按下了，開始移動 var left = currentTh.offset().left; var paddingBorderLen = currentTh.outerWidth()-currentTh.width();
 currentTh.width((e.pageX-left-paddingBorderLen)+'px');
 }
 }
 },
 mouseup:function (e) {
 isMouseDown = false;
 currentTh = null;
 $('table th').css('cursor','auto');
 $('#mask').remove();
 }
 });


});