function ecatalog(docu, kd, dir, resize){
	if(screen.width < 800){
		alert("The screen resolution should be over 800*600");
		return;
	}

	var x = screen.width;
	var y = screen.height;
	var wname = "ecatalog";

	if(kd == "fixed"){
		x = 1024;
		y = 768;
		wname = "fixed_ecatalog";
	}
	else if(screen.width > 1600 || screen.height > 1200){
		x = 1600;
		y = 1200;
	}

	x = x - 10;
	y = y - 58;

	if(resize == undefined || resize == "") resize = "yes";
	property = "toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=" + resize + ",scrollbars=no,copyhistory=no,";
	property += "width=" + x + ",height=" + y + ",left=" + 0 + ",top=" + 0;

	ecawin = window.open("http://www.is-com.net/ecatalog/ecatalog.asp?Dir="+dir, wname, property);
}