var browserName = navigator.appName;
	var browserVersion = parseInt(navigator.appVersion);

	var IE4 = ((browserName=="Microsoft Internet Explorer") && (browserVersion>=4));
	var NS4 = ((browserName=="Netscape") && (browserVersion>=4));
	var IE3 = ((browserName=="Microsoft Internet Explorer") && (browserVersion<4));
	var NS3 = ((browserName=="Netscape") && (browserVersion<4));	

	loaded = false;	


function okienko(url, width, height) {
        width1=width/2;
		height1=height/2;
		x=screen.availWidth/2-width1;
		y=screen.availHeight/2-height1;
        var Win = window.open(url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=0,scrollbars=1, menubar=no, left='+x+', top='+y );
  
};

function okienko2(url, width, height) {
        width1=width/2;
		height1=height/2;
		x=screen.availWidth/2-width1;
		y=screen.availHeight/2-height1;
		
		if(screen.availHeight<800 && height >600){
	        z=parseInt(width) + 20;		
			var Win = window.open(url,"displayWindow",'width=' + z + ',height=' + height + ',resizable=0,scrollbars=1, menubar=no, left='+x+', top='+y );
		}
		else{
			var Win = window.open(url,"displayWindow",'width=' + width + ',height=' + height + ',resizable=0,scrollbars=0, menubar=no, left='+x+', top='+y );
			
		}
  
};