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用js实现table单元格高宽调整,兼容合并单元格(兼容IE6、7、8、FF)实例
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先上效果图：

用js实现table单元格高宽调整,兼容合并单元格(兼容IE6、7、8、FF)实例

CSS:
复制代码 代码如下:
body{margin:0px;padding:0px;-moz-user-select:none;cursor:default;}

.tabEditDiv{position:absolute;width:15px;height:15px;cursor:pointer;}
.seltab{position:absolute;width:15px;height:15px;cursor:pointer;background:url(images/seltab.gif) no-repeat;}
.splitx{overflow:hidden;position:absolute;height:3px;cursor:row-resize;background:red !important;filter:Alpha(opacity=10);-moz-opacity:0.1;opacity: 0.1; }
.splity{overflow:hidden;position:absolute;width:3px;cursor:col-resize;background:red !important;filter:Alpha(opacity=10);-moz-opacity:0.1;opacity: 0.1;}
#tabletitle{font-weight:bold;font-size:18px;height:30px;width:800px;margin:0 auto;text-align:center;font-family:宋体;line-height:30px;}
#tabletitle input{width:100%;border:0px;height:28px;line-height:30px;text-align:center;font-weight:bold;font-size:18px;font-family:宋体;}
.finelinetable{border-right:1px solid #000;border-top:1px solid #000;border-collapse:collapse;font-size:13px;width:800px;margin:0 auto;}
.finelinetable td{border-left:1px solid #000;border-bottom:1px solid #000;height:25px;}

HTML:
复制代码 代码如下:
<body>
     <div id="tabletitle">表格标题</div>
     <table id="mainTable" class="finelinetable">
         <tr>
             <td colspan="8">1</td>
         </tr>
         <tr>
             <td rowspan="3">2</td>
             <td>3</td>
             <td colspan="3">4</td>
             <td>5</td>
             <td>6</td>
             <td>7</td>
         </tr>
         <tr>
             <td>8</td>
             <td>9</td>
             <td>10</td>
             <td colspan="2">11</td>
             <td>12</td>
             <td>13</td>
         </tr>
         <tr>
             <td>14</td>
             <td colspan="3">15</td>
             <td>16</td>
             <td>17</td>
             <td>18</td>
         </tr>
         <tr>
             <td colspan="8">&nbsp;</td>
         </tr>
         <tr>
             <td rowspan="3">&nbsp;</td>
             <td>&nbsp;</td>
             <td colspan="2">&nbsp;</td>
             <td>&nbsp;</td>
             <td colspan="3">&nbsp;</td>
         </tr>
         <tr>
             <td>&nbsp;</td>
             <td colspan="2">&nbsp;</td>
             <td>&nbsp;</td>
             <td colspan="3">&nbsp;</td>
         </tr>
         <tr>
             <td style="height: 25px">&nbsp;</td>
             <td colspan="2" style="height: 25px">&nbsp;</td>
             <td style="height: 25px">&nbsp;</td>
             <td colspan="3" style="height: 25px">&nbsp;</td>
         </tr>
         <tr>
             <td>&nbsp;</td>
             <td colspan="7">&nbsp;</td>
         </tr>
         <tr>
             <td colspan="2">&nbsp;</td>
             <td colspan="6">&nbsp;</td>
         </tr>
         <tr>
             <td colspan="2">&nbsp;</td>
             <td colspan="6">&nbsp;</td>
         </tr>
         <tr>
             <td colspan="2">&nbsp;</td>
             <td colspan="6">&nbsp;</td>
         </tr>
     </table>
 </body>

JS:
复制代码 代码如下:
//注释:获取对象.示例:$("objectId") 等同于 document.getElementById("objectId")
 if (typeof $ != "function") { var $ = function (ids) { return document.getElementById(ids) }; }
 //注释:获取坐标,parentNode最后节点.示例:absPos(object).x
 function absPos(_node, parentNode) { var x = y = 0; var node = _node; do { if (parentNode && node == parentNode) { break; } x += node.offsetLeft; y += node.offsetTop; } while (node = node.offsetParent); node = _node; return { 'x': x, 'y': y }; }
 function addEvent(object, event, func) { if (object.addEventListener) { /* W3C方法（DOM方法）下面语句中的false意思是用于冒泡阶段,若是true则是用于捕获阶段（IE不支持捕获），所以这里用false是一方面的原因是为了统一 */object.addEventListener(event, func, false); return true; } else if (object.attachEvent) { /* MSIE方法(IE方法) */object['e' + event + func] = func; object[event + func] = function () { object['e' + event + func](window.event); }; object.attachEvent('on' + event, object[event + func]); return true; } /*如两种方法都不具备则返回false */return false; }
 //注释:判断是否是对象内子节点触发的onmouseover和onmouseout.示例:e = e || event;if (isMouseLeaveOrEnter(e, obj)) {}
 function isMouseLeaveOrEnter(e, handler) { if (e.type != 'mouseout' && e.type != 'mouseover') return false; var reltg = e.relatedTarget ? e.relatedTarget : e.type == 'mouseout' ? e.toElement : e.fromElement; while (reltg && reltg != handler) reltg = reltg.parentNode; return (reltg != handler); }

 var table = $("mainTable");
 var tabEditDiv; //覆盖在table上的DIV
 var cellHide = [];//补充的rowspan,cellspan的格子
 var moveMode = "";//鼠标移动模式
 var moveArgs = []; //移动模式参数

 document.onselectstart = function(){return false;};
 addEvent(window,"resize",function(){loadTable();});

 $("tabletitle").ondblclick = function(){
     if(this.getElementsByTagName("input").length > 0){return;}
     this.innerHTML = "<input type='text' value='" + (this.innerHTML == "表格标题" ? "" : this.innerHTML) + "' />";
     var input = this.getElementsByTagName("input")[0];
     var _this = this;
     input.focus();
     input.onblur = function(){_this.innerHTML = this.value;}
     input.onkeydown = function (e) { var key = window.event ? window.event.keyCode : e.which; if (key == 13) this.blur(); };
 }

 function loadTable(){
     var tabPos = absPos(table);
     if(!tabEditDiv){
         tabEditDiv = document.createElement("div");
         document.body.appendChild(tabEditDiv);
     }
     tabEditDiv.style.cssText = "left:" + (tabPos.x - 15) + "px;top:" + (tabPos.y - 15) + "px;";
     tabEditDiv.className = "tabEditDiv";

     //全选Table按钮
     if(!seltab){
         var seltab = document.createElement("div");
         seltab.style.cssText = "width:15px;height:15px;left:" + (tabPos.x - 15) + "px;top:" + (tabPos.y - 15) + "px;";
         seltab.className = "seltab";
         seltab.onclick = function(){
             if(table.getAttribute("selected") == "1"){
                 table.removeAttribute("selected");
                 table.style.background = "";
                 this.style.width = "15px";
                 this.style.height = "15px";
             }else{
                 table.setAttribute("selected","1");
                 table.style.background = "#B6CAEB";
                 this.style.width = (table.clientWidth + 15) + "px";
                 this.style.height = (table.clientHeight + 15) + "px";
             }
         }
         document.body.appendChild(seltab);
     }
     loadTableEdit();
 } loadTable();

 function loadTableEdit(){ //加载可调整宽度及高度的div
     var tabPos = absPos(table);
     tabEditDiv.innerHTML = "";
     var cellcount = 0;
     var isadd = cellHide.length == 0;
     for(var i=0;i<table.rows.length;i++){
         for(var j=0;j<table.rows[i].cells.length;j++){
             var pos = absPos(table.rows[i].cells[j],table);
             if(!$("splitx_" + (pos.y + table.rows[i].cells[j].clientHeight))){ //加载可调整高度的div
                 var split = document.createElement("div");
                 split.id = "splitx_" + (pos.y + table.rows[i].cells[j].clientHeight);
                 split.className = "splitx";
                 split.style.cssText = "width:" + table.clientWidth + "px;left:15px;top:" + (pos.y + table.rows[i].cells[j].clientHeight - 1 + 15) + "px";
                 split.onmousedown = function(){
                     var index = this.getAttribute("index");
                     if(index == null){ index = 0; var divs = tabEditDiv.getElementsByTagName("div"); var left = parseInt(this.id.split("_")[1]); for(var k=0;k<divs.length;k++){ if(divs[k].id.indexOf("splitx_") < 0) continue; if(parseInt(divs[k].id.split("_")[1]) < left) index++; } this.setAttribute("index",index);}else{index = parseInt(index);}
                     moveMode = "cellHeight";
                     moveArgs[moveArgs.length] = index;
                 }
                 tabEditDiv.appendChild(split);
             }
             if(j > 0){ //加载可调整宽度的div
                 if(!$("splity_" + pos.x)){
                     var split = document.createElement("div");
                     split.id = "splity_" + pos.x;
                     split.className = "splity";
                     split.style.cssText = "height:" + table.clientHeight + "px;top:15px;left:" + (pos.x - 2 + 15) + "px";
                     split.onmousedown = function(){
                         var index = this.getAttribute("index");
                         if(index == null){ index = 0; var divs = tabEditDiv.getElementsByTagName("div"); var left = parseInt(this.id.split("_")[1]); for(var k=0;k<divs.length;k++){ if(divs[k].id.indexOf("splity_") < 0) continue; if(parseInt(divs[k].id.split("_")[1]) < left) index++; } this.setAttribute("index",index);}else{index = parseInt(index);}
                         moveMode = "cellWidth";
                         moveArgs[moveArgs.length] = index;
                     }
                     tabEditDiv.appendChild(split);
                 }
             }
             if(isadd){
                 loadHide();
             }
             table.rows[i].cells[j].onmousedown = function(){
                 //alert("x");
             }
         }
     }
 }

 function loadHide(){
     cellHide = [];
     var tempHide = [];
     for(var i=0;i<table.rows.length;i++){
         for(var j=0;j<table.rows[i].cells.length;j++){
             for(var k=1;k<table.rows[i].cells[j].rowSpan;k++){
                 cellHide[cellHide.length] = [i+k,j];
                 tempHide[tempHide.length] = [i+k,j];
             }
         }
     }
     for(var i=0;i<table.rows.length;i++){
         for(var j=0;j<table.rows[i].cells.length;j++){
             for(var k=1;k<table.rows[i].cells[j].colSpan;k++){
                 var yc = 0;
                 for(var l=0;l<tempHide.length;l++){
                     if(tempHide[l][0]==i&&tempHide[l][1]<j){yc++;}
                 }
                 for(var l=0;l<j;l++){
                     if(table.rows[i].cells[l].colSpan > 1){yc+=table.rows[i].cells[l].colSpan-1;}
                 }
                 cellHide[cellHide.length] = [i,j+k+yc];
             }
         }
     }
 }

 addEvent(document,"mousemove",function(e){
     e = e || window.event;
     if(moveMode == "cellWidth"){ //调整宽度

         var temp = moveArgs[0];
         var test = "";
         for(var i=0;i<table.rows.length;i++){
             var index = temp;
             for(var j=0;j<cellHide.length;j++){
                 if(i==cellHide[j][0] && temp>=cellHide[j][1]){index--;}
             }
             if(!table.rows[i].cells[index] || index < 0 || table.rows[i].cells[index].colSpan > 1){continue;}
             if(e.clientX > absPos(table.rows[i].cells[index]).x)
                 table.rows[i].cells[index].style.width = e.clientX - absPos(table.rows[i].cells[index]).x + "px";
         }
         loadTableEdit();
     }else if(moveMode == "cellHeight"){ //调整高度
         var index = moveArgs[0];
         for(var i=0;i<table.rows[index].cells.length;i++){
             if(table.rows[index].cells[i].rowSpan > 1){continue;}
             if(e.clientY > absPos(table.rows[index].cells[i]).y)
                 table.rows[index].cells[i].style.height = e.clientY - absPos(table.rows[index].cells[i]).y + "px";
         }
         loadTableEdit();
     }
 });
 addEvent(document,"mouseup",function(e){
     moveMode = ""; moveArgs = [];
 });
 addEvent(document,"mouseout",function(e){
     e = e || event;
     if (!isMouseLeaveOrEnter(e, this)) { return; }
     moveMode = ""; moveArgs = [];
 });

标签：
table,单元格,调整,合并
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