FIG 3 illustrates as an example {HEAD ~ a message sequence} between {TAIL ~ a client} 110, which is a browser, and a server 300; this message sequence relates to the third preferred embodiment of the invention 
between
FIG 3 illustrates as an example { HEAD ~ a message sequence } between { TAIL ~ a client } 110 , which is a browser , and a server 300 ; this message sequence relates to the third preferred embodiment of the invention
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH