how to track the performance of any mutual funds bfore investing…?????

hi alll,

everyhwer i’ve found that before investing in any mutual fund please track the performance record of mutual fund..but it is nowhere mentioned that How to track themm..on what basis we can track the..????
what criterion shud we look….
yaar again everyone is saying same thing….track the performance of fund in th past….

its true that there are so many websites that shows performance reporst but …..
…can anybody tell me how to analyse the report..???

like “nav” shud go high or low…??
like how to measure returns..???