How to get Birt table data into an array

Migrateduser

<div>I am displaying a table with below values in BIRT.</div>
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<div>Date<span> </span>        | PaymentType|Amount</div>
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</div>
<div>4/20/2016 |<span> </span>Rent              |2500</div>
<div>5/20/2016 |<span> </span>Rent              |2500</div>
<div>6/20/2016 |<span> </span>Rent              |2700</div>
<div>7/20/2016 |<span> </span>Rent              |2800</div>
<div>8/20/2016 |<span> </span>Rent              |2800</div>
<div> </div>
<div>Know, I want the report to be displayed in the following way:</div>
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<div>Start DT   |<span> </span>EndDT <span> </span>    |  PaymentType|Highest Amount</div>
<div>

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</div>
<div>4/20/2016  |<span> </span>8/20/2016|<span> </span>Rent               |2800</div>
<div> </div>
<div>Can some one please suggest me how to get the table values into an array so that i can write a java script .</div>
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<div>I am using Tririga, So all field values will be java objects.</div>