old_contents: var pileup = require("pileup");
  
  var sources = [
    {
      viz: pileup.viz.genome(),
      isReference: true,
      data: pileup.formats.twoBit({
        url: 'http://www.biodalliance.org/datasets/hg19.2bit'
      })
    },
    {
      viz: pileup.viz.variants(),
      data: pileup.formats.vcf({
        url: '/test/data/snv.chr17.vcf'
      })
    },
    {
      viz: pileup.viz.genes(),
      data: pileup.formats.bigBed({
        url: 'http://www.biodalliance.org/datasets/ensGene.bb'
      })
    },
    {
      viz: pileup.viz.pileup(),
      data: pileup.formats.bam({
        url: '/test/data/synth3.normal.17.7500000-7515000.bam',
        indexUrl: '/test/data/synth3.normal.17.7500000-7515000.bam.bai'
      }),
      cssClass: 'normal'
    }
  ];
  
  var p = pileup.create(yourDiv, {
    range: {contig: 'chr17', start: 7512384, stop: 7512544},
    tracks: sources
  });
  
new_contents: var pileup = require("pileup");
  
  var sources = [
    {
      viz: pileup.viz.genome(),
      isReference: true,
      data: pileup.formats.twoBit({
        url: 'http://www.biodalliance.org/datasets/hg19.2bit'
      }),
      name: 'Reference'
    },
    {
      viz: pileup.viz.variants(),
      data: pileup.formats.vcf({
        url: '/test/data/snv.chr17.vcf'
      }),
      name: 'Variants'
    },
    {
      viz: pileup.viz.genes(),
      data: pileup.formats.bigBed({
        url: 'http://www.biodalliance.org/datasets/ensGene.bb'
      }),
      name: 'Genes'
    },
    {
      viz: pileup.viz.pileup(),
      data: pileup.formats.bam({
        url: '/test/data/synth3.normal.17.7500000-7515000.bam',
        indexUrl: '/test/data/synth3.normal.17.7500000-7515000.bam.bai'
      }),
      cssClass: 'normal',
      name: 'Alignments'
    }
  ];
  
  var p = pileup.create(yourDiv, {
    range: {contig: 'chr17', start: 7512384, stop: 7512544},
    tracks: sources
  });
  
subject: Set track labels in demo