var someText="web2.0 .net2.0";
var pattern=/(\w+)(\d)\.(\d)/;
var outCome_exec=pattern.exec(someText);
var outCome_matc=someText.match(pattern);
document.write(outCome_exec)
document.write(outCome_matc)

var someText="web2.0 .net2.0";
var pattern=/(\w+)(\d)\.(\d)/g;
var outCome_exec=pattern.exec(someText);
var outCome_matc=someText.match(pattern);
document.write(outCome_exec)
document.write(outCome_matc)