function checkForm(f) {
		if (f.host.value == "") {
			alert("Please supply a host to connect to.");
			return false;
		}
		if (f.port.value == "") {
			alert("Please supply the VNC port. (Usually 5900)");
			return false;			
		}
		if (f.screenwidth.value == "") {
			alert("Err.. I already detect the screen size for you. Why did you delete it? Put in a width.");
			return false;			
		}		
		if (f.screenheight.value == "") {
			alert("Err.. I already detect the screen size for you. Why did you delete it? Put in a height.");
			return false;			
		}	
		return true;
	}