mutualfund online

How can we get to know or where do we get the information regarding how much the fund managers hold in the mutual fund they manage?

Hello, I have invested few Mutual funds before, always through the Brokers and invested lumpsum. Now, I am thinking if there is an option to buy existing or new mutual funds either lumpsum or SIP method. Is it possible through online? If so, which are the best websites to start with...