SPRINGFIELD — Family law experts and other advocates clashed for nearly two hours today on a bill that would alter standards for divvying up parenting time.Brought forward by a nonprofit fathers’ rights group, House Bill 4113 would add language to the state’s marriage and divorce law saying equal time for each parent is presumed to be in a child’s best interests.Sponsored by Rep. LaShawn Ford, a Chicago Democrat, the measure would also increase the evidentiary standard for determining whether a …