how to get items.count of datalist in javascript

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ASP.NET

Javascript

i'm able to get rows.length and i' m looping through it in order to count no.of cells

for (i = 0; i < dlOption.rows.length; i++) {
                       n = n + dlOption.rows[i].cells.length
                   }

But here the problem is

if suppose my datalist contains 2 rows with four columns each, then I'm getting count as 8

But actually it cosnsits 5 items in two rows i have to get exact item count in javascript


where dloption is my rendered datalist in viewsource