var tds = document.querySelectorAll("td, th");
var groups = [];
for(var i = 0; i < tds.length; i++){
if(tds[i].getAttribute('rowspan') != null){
var rspan = tds[i];
groups.push({
parent: rspan.parentNode,
height: rspan.getAttribute('rowspan')
});
}
}
var count = 0;
var rows = document.querySelectorAll('tr');
var dark = true;
for(var i = 0; i < rows.length; i++){
var row = rows[i];
var index = groupIndex(row);
if(index != null && dark){
var group = groups[index];
var height = parseInt(group.height);
for(var j = i; j < i + height; j++){
rows[j].classList.add('dark');
}
i += height - 1;
dark = !dark;
continue;
}
if(dark){
rows[i].classList.add('dark');
}
dark = !dark;
}
function groupIndex(element){
for(var i = 0; i < groups.length; i++){
var group = groups[i].parent;
if(group == element){
return i;
}
}
return null;
}
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