smil-clockvalue
Parse and validate a SMIL clock value as defined in the spec
Returns the parsed clock value in milliseconds
Examples
var clockvalue = ; // 3.2 hours = 3 hours and 12 minutes == 11520000 // 45 minutes == 2700000 // 50 hours, 10 seconds and 250 milliseconds == 180010250 // 2 minutes and 33 seconds == 153000 // Default metric is seconds == 12467