JS合并表格的列

jsp页面上实现表格的竖向合并。
01 	/**
02 	 * 合并表格的列
03 	 * @param {String} tableId要合并的表格的id
04 	 * @param {int} fCol开始的列
05 	 * @param {int} eCol结束的列
06 	 * @return void
07 	 */
08 	function mergCol(tableId, fCol, eCol) {
09 	    var oTable = $(tableId);
10 	    if (/*!$chk(oTable)*/!oTable) {
11 	        return;
12 	    }
13 	    var oTBody = oTable.tBodies[0];
14 	    var oRows = oTBody.rows;
15 	    if (oRows.length == 0)  {
16 	        return;
17 	    }
18 	    for (var j = fCol; j <= eCol; j++) {
19 	        var oRow = oRows[0];
20 	        var rowspan = 1;
21 	        for (var i = 1; i < oRows.length; i++) {
22 	            var oNextRow = oRows[i];
23 	            if (oRow.cells[j].innerHTML == oNextRow.cells[j].innerHTML) {
24 	                rowspan++;
25 	                oRow.cells[j].merg = rowspan;
26 	                oNextRow.cells[j].merg = -1;
27 	            } else {
28 	                oRow = oNextRow;
29 	                rowspan = 1
30 	            }
31 	        }
32 	    }
33 	     
34 	    for (var i = oRows.length - 1; i >= 0; i--) {
35 	        for (var j = eCol; j >= fCol; j--) {
36 	            var oRow = oRows[i];
37 	            if (oRow.cells[j].merg == -1) {
38 	                oRow.cells[j].parentNode.removeChild(oRow.cells[j]);
39 	            } else {
40 	                if (oRow.cells[j].merg > 0) {
41 	                    oRow.cells[j].rowSpan = oRow.cells[j].merg;
42 	                }
43 	            }
44 	        }
45 	    }
46 	}