封装代码:
jQuery.fn.rowspan = function (colIdx) { //封装JQuery同列值相同合并小插件 ???????return this.each(function () { ???????????var that; ???????????$(‘tr‘, this).each(function (row) { ???????????????$(‘td:eq(‘ + colIdx + ‘)‘, this).filter(‘:visible‘).each(function (col) { ???????????????????if (that != null && $(this).html() == $(that).html()) { ???????????????????????rowspan = $(that).attr("rowSpan"); ???????????????????????if (rowspan == undefined) { ???????????????????????????$(that).attr("rowSpan", 1); ???????????????????????????rowspan = $(that).attr("rowSpan"); ???????????????????????} ???????????????????????rowspan = Number(rowspan) + 1; ???????????????????????$(that).attr("rowSpan", rowspan); ???????????????????????$(this).hide(); ???????????????????} else { ???????????????????????that = this; ???????????????????} ???????????????}); ???????????}); ???????}); ???}调用方式:
$("#ceshi").rowspan(0); //.rowspan(0)从0即第一列开始2纯js写法:
function hb(){ var tab = document.getElementById("subtable"); var maxCol = 3, val, count, start; var ys=""; for(var col = maxCol-1; col >= 0 ; col--) { count = 1; val = ""; for(var i=0; i<tab.rows.length; i++){ if(val == tab.rows[i].cells[col].innerHTML){ count++; }else{ if(count > 1){ //合并 start = i - count; if(ys=="#00FFFF"){ ys="#EEEE00"; }else{ ys="#00FFFF"; } tab.rows[start].cells[col].rowSpan = count; tab.rows[start].cells[1].style.backgroundColor=ys;//改变颜色 // ys="#EEEE00"; // tab.rows[i].cells[1].style.backgroundColor="#00FFFF";//改变颜色绿色 for(var j=start+1; j<i; j++){ // tab.rows[j].cells[col].style.display = "none"; tab.rows[j].removeChild(tab.rows[j].cells[col]); } count = 1; } val = tab.rows[i].cells[col].innerHTML; } } if(count > 1 ){ //合并，最后几行相同的情况下 start = i - count; tab.rows[start].cells[col].rowSpan = count; for(var j=start+1; j<i; j++) { tab.rows[j].removeChild(tab.rows[j].cells[col]); } } } } 第一种方法，仅用20行代码就可实现该功能，而且封装在jq库里面，其他页面可以直接调用。也就是说，其他页面只需一行代码就可实现该功能。即$("#ceshi").rowspan(0);
比起第一种，第二种方法比较复杂，而且会把tabel里面所有相同列都合并，不实用。而且要改成仅合并第一列的话也不太好实现。但是思路可以学习一下。
封装Jquery 合并table中任何同列数据
原文地址：http://www.cnblogs.com/Godlovezk/p/8033791.html