function getWinW() {
  if (window.innerWidth) return window.innerWidth;
  else if (document.documentElement && document.documentElement.clientWidth) return document.documentElement.clientWidth;
  else if (document.body && document.body.clientWidth) return document.body.clientWidth;
  else return "n/a";
}

function checkSpace() {
	var browser = navigator.appName;
	var verze = parseInt(navigator.appVersion);
	var sirka = getWinW();
	
//	alert(sirka + ", " + browser + ", " + verze);
	
	if (((browser == "Microsoft Internet Explorer" & verze >= 4) | (browser == "Netscape" & verze >= 4)) & sirka!="n/a"){
		if (sirka>=940) {
			document.getElementById("colDef1").disabled=true;
			document.getElementById("colDef2").disabled=false;
		} else {
			document.getElementById("colDef1").disabled=false;
			document.getElementById("colDef2").disabled=true;
		}
	} else {
		document.getElementById("colDef1").disabled=true;
		document.getElementById("colDef2").disabled=false;
	}
}

function checkWtSpace() {
	var browser = navigator.appName;
	var verze = parseInt(navigator.appVersion);
	var sirka = getWinW();
	
//	alert(sirka + ", " + browser + ", " + verze);
	
	if (((browser == "Microsoft Internet Explorer" & verze >= 4) | (browser == "Netscape" & verze >= 4)) & sirka!="n/a"){
		if (sirka>=940) {
			document.getElementById("tipsDefUp").disabled=false;
			document.getElementById("tipsDefDown").disabled=true;
		} else {
			document.getElementById("tipsDefUp").disabled=true;
			document.getElementById("tipsDefDown").disabled=false;
		}
	} else {
		document.getElementById("tipsDefUp").disabled=true;
		document.getElementById("tipsDefDown").disabled=false;
	}
}

function checkBrowser() {
	var browser = navigator.appName;
	var verze = parseInt(navigator.appVersion);
	var sirka = getWinW();
	
//	alert(sirka + ", " + browser + ", " + verze);
	
	if (browser == "Microsoft Internet Explorer" & verze >= 4) {
		document.getElementById("msieSpecials").disabled=false;
	} else {
		document.getElementById("msieSpecials").disabled=true;
	}
}