function testNavigateurs(){
	try{
		if (navigator.userAgent.toLowerCase().search("msie")>-1 && navigator.userAgent.toLowerCase().search("opera")==-1){			
			//alert('IE');
			var myindex = navigator.appVersion.toLowerCase().indexOf("msie");
			var numver = navigator.appVersion.charAt(myindex*1 + 5);
			if (numver * 1 < 6) throw (e);
			return true;
		}
		else if (navigator.userAgent.toLowerCase().search("firefox")>-1){
			//Version 1.5 et +
			var tab1 = navigator.userAgent.split('/');
			var tab2 = tab1[tab1.length-1].toString().split('.');
			var numver = tab2[0] + ((tab2.length>1)?'.' + tab2[1]:'');
			if (numver * 1 < 1.5) throw (e);
			return true;
		}
        else if (navigator.userAgent.toLowerCase().search("safari") > -1) {
            //Version 3 et +
            var tab1 = navigator.userAgent.split('/');
            for (var i = 0; i < tab1.length; i++) {
                if (tab1[i] == "Version") {
                    var numver = tab1[i + 1][0];
                    if (numver * 1 < 3) throw (e);
                }
            }
            return true;
        }
		else throw(e);
	}
	catch(e){
		document.location = "/erreur/browser.aspx";
	}
}