/**********************************************************
DÉTECTIONS DES BROWSERS
**********************************************************/
//détecter IE
var is_ie = ( /msie/i.test(navigator.userAgent) && !/opera/i.test(navigator.userAgent) );

//détecter vieux IE
var is_ie5 = ( is_ie && /msie 5\.0/i.test(navigator.userAgent) );

var is_ie6 = ( is_ie && /msie 6\.0/i.test(navigator.userAgent) );

var is_ie7 = ( is_ie && /msie 7\.0/i.test(navigator.userAgent) );

var is_ie8 = ( is_ie && /msie 8\.0/i.test(navigator.userAgent) );

//détecter opera...
var is_opera = /opera/i.test(navigator.userAgent);

// detecter les browsers basés sur KHTML
var is_khtml = /Konqueror|Safari|KHTML/i.test(navigator.userAgent);