choose labels to show inside legend of jqplot - limit

Question

the jqPlot displays labels of ALL the series it has on the graph. I want to show only some of the series on the labels. The thing is that some of lines are just there to show proper limit for values (visually) - some points are above, some below. For now I simply put empty string for labels, but the label point in the label area is still there - it doesn't look good.
Here is the code:
series:[
{lineWidth:1, color: '#d8d8d8', showMarker: false},
{lineWidth:0.5, color: 'red', showMarker: false},
{lineWidth:1, color: '#d8d8d8', showMarker: false},
{lineWidth:1, color: '#d8d8d8', showMarker: false},
{lineWidth:1, color: '#76a4e8', showMarker: false},
{lineWidth:1, color: '#d8d8d8', showMarker: false},
{lineWidth:0.5, color: 'red', showMarker: false},
{lineWidth:1, color: '#d8d8d8', showMarker: false},
{lineWidth:1, color: '#d8d8d8', showMarker: false},
{
lineWidth:0.5,
color: 'green',
rendererOptions: {animation: {speed: 1500}},
markerOptions:{color: 'green',
style:'filledSquare'},
},
//here are the series with real values - they come from php in red or orange
],
legend:{
renderer: jQuery.jqplot.EnhancedLegendRenderer,
show: true,
hideZeros: true,
location: 'e',
//labele with names
//labels: [ 'SD+4', 'SD+3', 'SD+2', 'SD+1','Perfect value', 'SD-1', 'SD-2', 'SD-3', 'SD-4', 'Real Values', 'Vales to high'],
//labele with empty points
labels: [ ' ', ' ', ' ', ' ','Perfect value', ' ', ' ', ' ', ' ', 'Real Values', 'Vales to high'],
placement: 'outsideGrid'
}
As you see it doesn't look too good. Only Perfect value, real values, and values too high/low should be shown.