Determine the browser version

Window. onload = function detectbrowser () <br/>{< br/> var sagent = navigator. useragent. tolowercase (); // the browser name is converted to lowercase <br/> This. isie = (sagent. indexof ("MSIE ")! =-1); // IE6.0-7 browser <br/> var ieversion = (sagent. substr (sagent. indexof ("MSIE") + 5, 3); </P> <p> This. isff = (sagent. indexof ("Firefox ")! =-1); // Firefox browser <br/> This. Issa = (sagent. indexof ("safari ")! =-1); // Safari browser <br/> This. Isop = (sagent. indexof ("Opera ")! =-1); // operabrowser <br/> This. isnn = (sagent. indexof ("Netscape ")! =-1); // Netscape Browser <br/> This. Isma = (sagent. indexof ("Maxthon ")! =-1); // Maxthon browser <br/> This. isother = (! This. isie &&! This. isff &&! This. Issa &&! This. Isop &&! This. isnn &&! This. issa); // unknown browser <br/> If (this. isie) <br/> document. write ("/Nie Browser" + ieversion); <br/> If (this. isff) <br/> document. write ("/nfirefox"); <br/> If (this. issa) <br/> document. write ("/nsafari"); <br/> If (this. isop) <br/> document. write ("/nopera Browser"); <br/> If (this. isnn) <br/> document. write ("/nnetscape Browser"); <br/> If (this. isma) <br/> document. write ("/nmaxthon Browser"); <br/> If (this. isother) <br/> document. write ("/n your browser unknown"); <br/>}