The method rowspan merges the cells between 2 cells in the same column into one grid cell. It is similar to the same property in tables.
element - A two element array [colno,rowno], in which colno means column number and rowno means row number.
var pggrid = new jsgrid();
pggrid.init({
id:"wrp",
rows:5,
columns:12,
width:25,
height:20,
gutter:1,
backgroundColor: "#7fffd4"
});
var grp = pggrid.rowspan([3,1],[3,3]);
pggrid.setbackgroundcolor(grp,"#c00000");