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]); } } } }