Javascript Membuat Table

function tabelCell()
{
	var jml = document.getElementById("jml").value;
	if (cekAngka(jml))
	{
		document.getElementById("target").innerHTML = "Tabel Dengan Kolom dan Baris = " + jml +"<br><br>"
		var tabel="<table border=1 width='10%'>";
		for(a=1; a<=jml; a++)
 		{
				tabel += "<tr>";
				for (b=1; b<=jml; b++)
				{
					if(a>=b)
					tabel+="<td bgcolor='red'>"+a+","+b+"</td>";
					else
						tabel += "<td>"+a+","+b+"</td>";
				}
				tabel += "</tr>";
		}
		tabel+="</table>";
		document.getElementById("target").innerHTML += tabel;
	}
}