コメント付きでURLを投稿します。

repost.js

(function(){
	var link = location.href;
	var title = window.getSelection() + '' || document.title;
	//var text = window.getSelection();
	var quote = title + ' ' + link + ' ';
	//var total = {};
	//var year = '2012';
	//var all = false;
	var nick = 'たーちゃん';
	function init() {
		$('<div/>').css({
			position: 'fixed',
			left: 0,
			top: 0,
			width: '100%',
			height: '100%',
			zIndex: 1000,
			backgroundColor: 'rgba(0,0,0,.7)',
			color: '#fff',
			fontSize: 30,
			textAlign: 'center',
			paddingTop: '15em'
		}).attr('id', '___overlay').text('cafebot> ' + quote).appendTo('body');
		var text = window.prompt('投稿:', quote);
		//text && alert(text);
		/*
		$.post(
			'/lchat7/talk',
			{
				'ch':'javabreak',
				'text':quote
			},
			function(data){
				alert("success");
			}
		)
		.fail(function(){alert("error");});
		*/
		var data = {
			'ch':'javabreak',
			'nick':nick,
			'text':quote
		};
		var form = $('<form method="POST" />').attr('id', '___form').attr('acceptCharset', 'utf-8').attr('action', 'http://cafebabe.ddo.jp/lchat7/talk').hide().appendTo('body');
		for(key in data){
			var input = document.createElement('input');
			input.setAttribute('type', 'hidden');
			input.setAttribute('name', key);
			input.setAttribute('value', data[key]);
			form.append(input);
		}
		form.submit();
		$('#___overlay').remove();
		$('#___form').remove();
		return false;
	}

	if(typeof $ !== 'function') {
		var d=document;
		var s=d.createElement('script');
		s.src='//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js';
		s.onload=init;
		d.body.appendChild(s);
	} else {
		init();
	}
})();