jqplot text labels on y-axis - label

Question

I'm trying to make a Gantt like chart in jqplot. I want to make two timelines in the same plot. As you can see by the code and jsFiddel, I've got this working for the most part.
I've added a few series manually (and added a series config) ofcourse this will be in a loop later.
The problem I have now is that on the Y-axis I don't want numbers, but the text labels of the series ("contact" and "Locatie"). It would be nice if this is done dynamically, but 'hardcoding' them is not a problem since I only need two at the moment.
I can't find an example that does this. Any ideas?
here's the jsFiddle: http://jsfiddle.net/NVbjv/1/
var seriesCnf = Array();
var loc = Array();
// add location values
loc.push([[1340877534000, 1, 'lagehaghorst'] , [1340877569000, 1, 'lagehaghorst' ]]);
seriesCnf.push({color: "#941B80", label: "Locatie"});
loc.push([[1340877779000, 1, 'weegnet'] , [1340877869000, 1, 'weegnet' ]]);
seriesCnf.push({color: "#941B80"});
loc.push([[1340877989000, 1, 'lagehaghorst'] , [1340878139000, 1, 'lagehaghorst' ]]);
seriesCnf.push({color: "#941B80"});
// add ignition values
loc.push([[1340877534000, 2, 'uit'], [1340877561000, 2, null]]);
seriesCnf.push({color: "#FF0000", showMarker:false, label: "Contact"});
loc.push([[1340877561000, 2, 'aan'], [1340877779000, 2, null]]);
seriesCnf.push({color: "#00FF00", showMarker:false, pointLabels: {location: 'n'}});
loc.push([[1340877779000, 2, 'uit'], [1340877839000, 2, null]]);
seriesCnf.push({color: "#FF0000", showMarker:false});
loc.push([[1340877839000, 2, 'aan'], [1340878019000, 2, null]]);
seriesCnf.push({color: "#00FF00", showMarker:false, pointLabels: {location: 'n'}});
loc.push([[1340878019000, 2, 'uit'], [1340878139000, 2, null]]);
seriesCnf.push({color: "#FF0000", showMarker:false});
plot1 = $.jqplot('container', loc,{
seriesColors: ["#941B80"],
title: "Tijdlijn",
axes: {
xaxis: {
renderer: $.jqplot.DateAxisRenderer,
tickRenderer: $.jqplot.CanvasAxisTickRenderer,
tickOptions: {
formatString: '%R',
angle: 0
},
},
yaxis: {
min: 0,
tickInterval: 1,
}
},
seriesDefaults: {
showMarker:true,
pointLabels:{
show:true,
location:'s',
labelsFromSeries: true,
formatter: $.jqplot.DefaultTickFormatter,
}
},
series: seriesCnf,
grid: {
background: '#ffffff'
}
});