/*
Copyright 2010, JT WebDesign Studio - http://www.jtwds.cz/
*/


// Kontrola spravnosti emailove adresy
function IsEmail(str) {
	if (str == "") return true;
	var bRetval = !(str.indexOf(".") == -1 || str.indexOf(".") == 0 || str.indexOf(" ") > -1 || str.indexOf("..") > -1 || str.indexOf("@") == -1 || str.lastIndexOf(".") == (str.length - 1));
	return bRetval;
}


// Overeni zda se jedna o cislo
function IsNumber(str) {
	var num = "0123456789", result
	for (var i = 0; i <= str.length; i++) {
		if (-1 == num.indexOf(str.charAt(i))) { return (false); } else { result = true; }
	}
	return (result);
}


// Zobrazeni bublin na uvodu
function ShowBubble(bint) {
	document.getElementById('bubble-1').style.display = "";
	document.getElementById('bubble-2').style.display = "";
	document.getElementById('bubble-3').style.display = "";
	if (bint != '') {
		document.getElementById('bubble-' + bint).style.display = "inline";
	}
}


// Otevreni odkazu do samostatneho okna
function ExternalLinks() {
	if (!document.getElementsByTagName) return;
	var anchors = document.getElementsByTagName("a");
	for (var i = 0; i < anchors.length; i++) {
		var anchor = anchors[i];
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external") {
			anchor.target = "_blank";
		}
	}
}


window.onload = ExternalLinks;