regex to breakup a mixed object filter, used in a sammyjs script

regex breakdown of filter

// best if ran from a console debugger in firefox(firebug) / chrome(jsdebugger)

var str = 'market_cap;min=340,max=400,pe_ratio;min=4,max=23,div_yield;min=3.00,max=6.00';

str.match(/[a-z_]+;([a-z0-9=.]+,?){2}/g);