jqGrid : parameters are case sensitive

Note that the following did not work :

$("#abcd").jqGrid ( {
         dataType : myfuncname,
.........
})


but the following worked :


$("#abcd").jqGrid ( {
         datatype : myfuncname,
.........
})

Notice the casing : dataType vs datatype. 

I was used to type dataType for jquery ajax call, hence type it that way in jqgrid also and it didn't work.