How to set minimum order amount in Magento

var fbShare = {url: ‘http://sree.cc/magento-ecommerce-tips/how-to-set-minimum-order-amount-in-magento’,size:’large’} Login as admin, then select System->configuration, then select ‘Sales‘ from left Nav and click on ‘Minimum order amount‘.
Then select Yes from Enable dropdown, enter Minimum order amount, enter message and also enter error message that will be shown in shopping cart.