// Copyright 2001 Idocs.com      
// Distribute this script freely, but keep this notice in place

// backlink object initializer
function backlink() {
	this.text = '« Volver atrás';
	this.title = 'Volver atrás';
	this.type = 'link';
	this.write = backlink_write;
	this.form = true;
}

// write method
function backlink_write() {
	if (! window.history) return;
	if (window.history.length == 0)return;

	this.type = this.type.toLowerCase();
	if (this.type == 'button') {
		if (this.form)
			document.write('<form>');
		document.write('<input type="button" onClick="history.back(-1)" value="', this.text, '"');
		if (this.otheratts) document.write(' ', this.otheratts);
		document.write('>');
		if (this.form)document.write('<\/form>');
	} else {
		document.write('<a href="javascript:history.back(-1)" title="', this.title, '" class="boton"><span');
		if (this.otheratts)
			document.write(' ', this.otheratts);
		document.write('>');
		if (this.type == 'image' || this.type == 'img') {
			document.write('<img src="', this.src, '" alt="', this.text, '"');
			if (this.width) document.write(' width=', this.width);
			if (this.height) document.write(' height=', this.height);
			if (this.otherimgatts) document.write(' ', this.otherimgatts);
			document.write(' border="0" />');
		}
		else
			document.write(this.text);
		document.write('<\/span><\/a>');
	}
}