function EditFile (id)
{
	var id = id;
	var form = new Form ();
	var getSaveValue = false;
	
	
	this.onload = function ()
	{
		this.preview ();
	
		var value = form.get ("value["+id+"]");
		form.set ("force_download["+id+"]", !value.match (/&open=1/));
		form.set ("name["+id+"]", value.replace (/.*&filename=([^&]+).*|.*/, "$1"));
		form.set ("type["+id+"]", value.replace (/.*&type=[^&]+\/([^&]+).*|.*/, "$1"));
	}
	
	this.setValue = function (value)
	{
		if (typeof value == "object") {
			form.set ("value["+id+"]", value.value);
			form.set ("url["+id+"]", value.url);
			form.set ("type["+id+"]", value.type);
			form.set ("name["+id+"]", value.name);
			form.set ("force_download["+id+"]", value.force);
		} else {
			form.set ("value["+id+"]", value);
		}
		this.preview ();
	}
	
	this.getValue = function ()
	{
		if (getSaveValue) {
			// langsam aber gefiltert
			getSaveValue = false;
			return form.get ("value["+id+"]");
		} else {
			return {
				value : form.get ("value["+id+"]"),
				url : form.get ("url["+id+"]"),
				file : form.get ("file["+id+"]"),
				type : form.get ("type["+id+"]"),
				name : form.get ("name["+id+"]"),
				force : form.get ("force_download["+id+"]")
			};
		}
	}
	
	this.getAttributes = function (value)
	{
		if (typeof value == "object") {
			value = value.value;
		}
		
		if (form.get ("force_download["+id+"]")) {
			return {type:"file", url : value, target : ""};
		} else {
			return {type:"file", url : value};
		}
	}
	
	this.insertText = function (text)
	{
		var input = document.getElementById ("url["+id+"]");
		var start = input.selectionStart;
		var end = input.selectionEnd;
		input.value = input.value.substr (0, start) + text + input.value.substr (end);
		input.selectionStart = input.selectionEnd = start + text.length;
	}
	
	this.save = function ()
	{
		var fd = form.get ("force_download["+id+"]");
		
		if (fd && form.getElement ("name["+id+"]")!="" && !form.get ("name["+id+"]")) {
			showMessages (this.messages['filename not set']);
			return true;
		}
		if (!fd && form.getElement ("type["+id+"]")!="" && !form.get ("type["+id+"]")) {
			showMessages (this.messages['type not set']);
			return true;
		}
		
		var attributes = "";
		attributes += fd ? "" : "&open=1";
		attributes += "&type=" + this.filetypes[form.get ("type["+id+"]")];
		attributes += "&filename=" + form.get ("name["+id+"]");
		
		if (form.get ("url["+id+"]") || form.get ("file["+id+"]")) {
			// Datei in extra Fenster hochladen
			var target = "upload_" + new Date ().getTime ();
			var win = window.open ("", target, "width=200, height=100, status=no, toolbar=no, location=no, scrollbars=no");
			var node = win.document.createElement ("span");
			node.innerHTML = "<table width='100%' height='100%'><tr><td align='center' valign='middle'>Uploading ...</td></tr></table>";
			win.document.body.insertBefore (node, win.document.body.firstChild);
			
			form.set ("attributes["+id+"]", attributes);
			var fileform = document.getElementById ("form["+id+"]");
			fileform.target = target;
			fileform.submit ();
			fileform.reset ();
			
			edit[id].oldValue = this.getValue ();
			return true;
		} else if (form.get ("value["+id+"]")) {
			// nur Datei Parameter ändern
			form.set ("value["+id+"]", form.get ("value["+id+"]").replace (/(&uid=[^&]+).*/, "$1") + attributes);
			getSaveValue = true;
			return false;
		} else {
			// nichts tuen da bisher keine Datei hochgeladen wurde
			showMessages (this.messages['file not set']);
			return true;
		}
		return false;
	}
	
	this.focus = function ()
	{
		form.focus ("url["+id+"]")
	}


/***********************************************************************/
	
	this.changeValue = function (isUrl)
	{
		if (isUrl) {
			if (form.get ("file["+id+"]")) {
				var url = form.get ("url["+id+"]");
				if (url != this.oldValue.url) {
					document.getElementById ("form["+id+"]").reset ();
					form.set ("url["+id+"]", url);
				}
			}
			form.set ("name["+id+"]", form.get ("url["+id+"]").replace (/.*&filename=([^&]+).*|[^?&]*\/([^?&]+).*/, "$1$2"));
			form.set ("type["+id+"]", form.get ("url["+id+"]").replace (/.*&type=[^\/]+\/([^&]+).*|[^?&]*\.([^?&]+).*/, "$1$2"));
		} else {
			form.set ("url["+id+"]", "");
			form.set ("name["+id+"]", form.get ("file["+id+"]").replace (/.*\//, ""));
			form.set ("type["+id+"]", form.get ("file["+id+"]").replace (/.*\.(.+)/, "$1"));
		}
		form.set ("force_download["+id+"]", !form.get ("type["+id+"]"));
		hasChanged (id);
	}
	
	this.preview = function ()
	{
		var preview = document.getElementById ("preview["+id+"]");
		var value = form.get ("value["+id+"]");
		var link = "";
		
		if (value) {
			link = "<a href='"+value+"'>preview</a><br />";
		}
		preview.innerHTML = link;
	}

}