var isVALID = ((navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.substring(0,1) >= "3") || (navigator.appName == "Netscape" & navigator.appVersion.substring(0,1) >= "4"));

function o2(url) {
 if (isVALID) {
 var scr = "yes";
 var x = 930;
 var y = 860;

 var shotWindow = window.open(url, "o2",'toolbar=no,location=no,direction=no,width=' + x +',height=' + y + ',scrollbars=' + scr + ',status=no,menubar=no,resizable=no,top=50,left=50');
 shotWindow.focus();
 }
}

function valid() {
if (isVALID) return false; else return true;
};



var isVALID = ((navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.substring(0,1) >= "3") || (navigator.appName == "Netscape" & navigator.appVersion.substring(0,1) >= "4"));

function tmobile(url) {
 if (isVALID) {
 var scr = "yes";
 var x = 995;
 var y = 860;

 var shotWindow = window.open(url, "tmobile",'toolbar=no,location=no,direction=no,width=' + x +',height=' + y + ',scrollbars=' + scr + ',status=no,menubar=no,resizable=no,top=50,left=50');
 shotWindow.focus();
 }
}

function valid() {
if (isVALID) return false; else return true;
};



var isVALID = ((navigator.appName == "Microsoft Internet Explorer" && navigator.appVersion.substring(0,1) >= "3") || (navigator.appName == "Netscape" & navigator.appVersion.substring(0,1) >= "4"));

function vodafone(url) {
 if (isVALID) {
 var scr = "yes";
 var x = 993;
 var y = 814;

 var shotWindow = window.open(url, "vodafone",'toolbar=no,location=no,direction=no,width=' + x +',height=' + y + ',scrollbars=' + scr + ',status=no,menubar=no,resizable=no,top=50,left=50');
 shotWindow.focus();
 }
}

function valid() {
if (isVALID) return false; else return true;
};



<!--
var message="SMS-ZDARMA.CZ - www.sms-zdarma.cz";
function click(e) {
if (document.all) {
if (event.button==2||event.button==3) {
alert(message);
return false;
}
}
if (document.layers) {
if (e.which == 3) {
alert(message);
return false;
}
}
}
if (document.layers) {
document.captureEvents(Event.MOUSEDOWN);
}
document.onmousedown=click;
// --> 



function bookmark()
{
	title = "SMS-ZDARMA.CZ"; 
	url = document.URL;
	
	if (window.sidebar) { // Mozilla Firefox Bookmark
		window.sidebar.addPanel(title,url,"");
	} else if (window.external) { // IE Favorite
		window.external.AddFavorite(url,title);
	} else if(window.opera && window.print) { // Opera Hotlist
		return true;
	}
}