function ajaxUpdatePostNCall(instance,requestURL,para,instance2,requestURL2){
	$(instance).update('<img src="/images/loadingGraphic.gif" style="margin:5px;" />');
	requestURL = requestURL + '?' + new Date().getTime();
	var myAjax = new Ajax.Updater(instance, requestURL, {
									method: 'post', 
									parameters: para, 
									evalScripts: true,

									onComplete: function(){
										var cookieLan = readCookie("lan");
										if(cookieLan=="cn"){
											tc2sc(instance);
										}
										var myAjax2 = new Ajax.Updater(instance2, requestURL2, {
											method: 'get', 
											parameters: para, 
											evalScripts: true,
											onComplete: function(transport){
												if(!transport.responseText.blank()){
													$(instance2).show();
												}else{
													$(instance2).hide();
												}
											}
										});
									}
								  });
}

function ajaxUpdateFeeds(instance,requestURL,para,loader){
	$(loader).update('<img src="/images/loadingGraphic.gif" style="margin:3px 5px;" />');
	requestURL = requestURL + "?" + new Date().getTime();
	var myAjax = new Ajax.Updater(instance, requestURL, {
								  	method: 'get', 
								  	parameters: para, 
								  	evalScripts: true,
									onComplete: function(){
										$(loader).update('');
										var cookieLan = readCookie("lan");
										if(cookieLan=="cn"){
											tc2sc(instance);
										}
									}
								  });
}

focus_item = 'dummy';
function change_comment_form(feed_id){
	if(focus_item=='dummy'){//dummy 直接 appear
		var styles = $H({ display: "block" });
		var styles2 = $H({ width: "450px"});
		$('my_comment_cover'+feed_id).setStyle(styles.toObject());
		$('my_comment_btn'+feed_id).setStyle(styles.toObject());
		$('my_comment_content'+feed_id).setStyle(styles2.toObject());
		$('add_comment_text'+feed_id).setStyle(styles2.toObject());
		if($('add_comment_text'+feed_id).value=='Write a comment...'){
			$('add_comment_text'+feed_id).value='';
		}
		
		focus_item = feed_id;
		
		return false;
	}else{
		var styles = $H({ display: "none" });
		var styles2 = $H({ width: "485px"});
		$('my_comment_cover'+focus_item).setStyle(styles.toObject());
		$('my_comment_btn'+focus_item).setStyle(styles.toObject());
		$('my_comment_content'+focus_item).setStyle(styles2.toObject());
		$('add_comment_text'+focus_item).setStyle(styles2.toObject());
		//$('add_comment_text'+focus_item).value='Write a comment...';
		if($('add_comment_text'+focus_item).value==''){
			$('add_comment_text'+focus_item).value='Write a comment...';
		}
		
		styles = $H({ display: "block" });
		styles2 = $H({ width: "450px"});
		$('my_comment_cover'+feed_id).setStyle(styles.toObject());
		$('my_comment_btn'+feed_id).setStyle(styles.toObject());
		$('my_comment_content'+feed_id).setStyle(styles2.toObject());
		$('add_comment_text'+feed_id).setStyle(styles2.toObject());
		if($('add_comment_text'+feed_id).value=='Write a comment...'){
			$('add_comment_text'+feed_id).value='';
		}
		
		focus_item = feed_id;
		
		return false;
	}
}

function feedSendComment(feed_id,type,thing_id,owner_id){
	var comment = $('add_comment_text'+feed_id).value;
	if(comment=='Write a comment...'||comment==''){
		return;
		
	}else{
		ajaxUpdatePost('comment-block'+feed_id,'/db_includes/ajax_add_comment_action.php','comment='+encodeURIComponent(comment)+'&type='+type+'&thing_id='+thing_id+'&owner_id='+owner_id+'&feed_id='+feed_id);
		$('add_comment_text'+feed_id).value='';
	}
}
function sz(t) {
	a = t.value.split('\n');
	b=0;
	for (x=0;x < a.length; x++) {
		if (a[x].length >= 35) b+= Math.floor(a[x].length/35);
	}
	b+= a.length;
	var newpx = (b*15)+'px';
	var styles2 = $H({ height: newpx});
	if((b*15) <= 200)
	t.setStyle(styles2.toObject());
}