<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
</head>
<body>
<div id="table"></div>
<script>
function generateTable(row, column){
var table = '<table>';
for(var i=1;i<=row;i++){
table += '<tr>';
for(var j=1;j<=column; j++){
table += '<td>' + i + ':' + j + '</td>';
}
table += '</tr>';
}
table += '</table>';
document.getElementById('table').innerHTML = table;
}
generateTable(10,10);
[...document.querySelectorAll('td')].sort(_=>Math.random() - 0.5).slice(0,6).forEach(el=>el.style.backgroundColor='red');
</script>
</body>
</html>