//显示表情菜单
function showFace(showid, target) {
	var div = $('face_bg');
	if(div) {
		div.parentNode.removeChild(div);
	}
	div = document.createElement('div');
	div.id = 'face_bg';
	div.style.position = 'absolute';
	div.style.left = div.style.top = '0px';
	div.style.width = '100%';
	div.style.height = document.body.scrollHeight + 'px';
	div.style.backgroundColor = '#000';
	div.style.zIndex = 10000;
	div.style.display = 'none';
	div.style.filter = 'progid:DXImageTransform.Microsoft.Alpha(opacity=0,finishOpacity=100,style=0)';
	div.style.opacity = 0;
	div.onclick = function() {
		$(showid+'_menu').style.display = 'none';
		$('face_bg').style.display = 'none';
	}
	$('append_parent').appendChild(div);
	
	if($(showid + '_menu') != null) {
		$(showid+'_menu').style.display = '';
	} else {
		var faceDiv = document.createElement("div");
		faceDiv.id = showid+'_menu';
		faceDiv.className = 'facebox';
		faceDiv.style.position = 'absolute';
		var faceul = document.createElement("ul");
		for(i=1; i<31; i++) {
			var faceli = document.createElement("li");
			faceli.innerHTML = '<img src="image/face/'+i+'.gif" onclick="insertFace(\''+showid+'\','+i+', \''+ target +'\')" style="cursor:pointer; position:relative;" />';
			faceul.appendChild(faceli);
		}
		faceDiv.appendChild(faceul);
		$('append_parent').appendChild(faceDiv)
	}
	//定位菜单
	setMenuPosition(showid, 0);
	div.style.display = '';
}
//插入表情
function insertFace(showid, id, target) {
	var faceText = '[em:'+id+':]';
	if($(target) != null) {
		insertContent(target, faceText);
	}
	$(showid+'_menu').style.display = 'none';
	$('face_bg').style.display = 'none';
}

function textCounter(obj, showid, maxlimit) {
	var len = obj.value.length;
	var showobj = $(showid);
	if(len > maxlimit) {
		obj.value = obj.value.substring(0, maxlimit);
		showobj.innerHTML = '0';
	} else {	 
		showobj.innerHTML = maxlimit - obj.value.length;;
	}
	if(maxlimit - len > 0) {
		showobj.parentNode.style.color = "";
	} else {
		showobj.parentNode.style.color = "red";
	}
}