function urlwindow(){
	url = document.form1.url.value;
	if(url && url != 'http://'){
		document.getElementById('urlwindow').style.display = 'block';
		document.getElementById('submitbutton').style.display = 'block';
	}else{
		document.getElementById('urlwindow').style.display = 'none';
		document.getElementById('submitbutton').style.display = 'none';
		alert("Please enter your URL first");
	}
	document.getElementById('urliframe').src = url;
}