yboy82 9/20/2011If it is a water leak not coolant leak, it is possible that your evaporator drain hose is disconnected or clogged. But if it is coolant you should check the condition of the heater core and its hose.
yboy82 9/20/2011If you don't have any idea what Am I talking about, I suggest that you take your vehicle to a service shop. Some shops offers a free diagnostic before giving you a quote, meaning they have to check first your vehicle and confirm what really is the cause of the leak.
Try the AutomD Negotiator ( http://www.automd.com/negotiator/) feature on this site it is free. They will call local shops for the repair that you needed and send the multiple quotes from your local shops. So you can compare job prices within your area.