Share Link error

Share = {
	vkontakte: function(purl, ptitle, pimg, text) {
		url  = 'http://vkontakte.ru/share.php?';
		url += 'url='          + encodeURIComponent(purl);
		url += '&title='       + encodeURIComponent(ptitle);
		url += '&description=' + encodeURIComponent(text);
		url += '&image='       + encodeURIComponent(pimg);
		url += '&noparse=true';
		Share.popup(url);
	}
}
<%= link_to 'VK', '', :onclick =>  "Share.vkontakte('URL','#{@post.title}','IMG_PATH', '#{@post.description}')" %>

this is error