change table row class

change table row class

Hello guys,
I have a table with alternate css. When "remove" link is clicked on any row, I want to reset the CSS. I tried to loop through all the rows in my table and call a "removeClass" and "addClass" but I get an error message saying this method is not supported. Can someone please tell me how I can do this? This is what I have so far:
var i = 1;
var rows = $("#tblContractLabor").find("tbody > tr").get();
$.each(rows, function(index, row) {
// write code to reset css. how???
}
)