What the setCell command does in javascript

By the name implies that this command configures a cell in a table / grid. But I'm having trouble understanding its syntax mixed with asp .

<%If col_cod <> "" Then %>
    oGrid.setCell(<%=linha%>,'<%=col_cod%>',codigo);
<% End If %>

<%If col_nom <> "" Then %>
    oGrid.setCell(<%=linha%>,'<%=col_nom%>',descricao);
<% End If %>

It seems to populate the col_cod column with the value of codigo and col_nom with the value of Descricao , but it complicates the first parameter, which in this case is the value coming from asp to linha . So what exactly does it do?