//显示表情菜单

function showFace(showid, target) {

	var div = $('uchome_face_bg');

	if(div) {

		div.parentNode.removeChild(div);

	}

	div = document.createElement('div');

	div.id = 'uchome_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 = '#FFFFFF';

	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';

		$('uchome_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<41; 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';

	$('uchome_face_bg').style.display = 'none';

}



function textCounter(obj, showid, maxlimit) {

	var len = strLen(obj.value);

	var showobj = $(showid);

	if(len > maxlimit) {

		obj.value = getStrbylen(obj.value, maxlimit);

		showobj.innerHTML = '0';

	} else {

		showobj.innerHTML = maxlimit - len;

	}

	if(maxlimit - len > 0) {

		showobj.parentNode.style.color = "";

	} else {

		showobj.parentNode.style.color = "red";

	}

	

}

function getStrbylen(str, len) {

	var num = 0;

	var strlen = 0;

	var newstr = "";

	var obj_value_arr = str.split("");

	for(var i = 0; i < obj_value_arr.length; i ++) {

		if(i < len && num + byteLength(obj_value_arr[i]) <= len) {

			num += byteLength(obj_value_arr[i]);

			strlen = i + 1;

		}

	}

	if(str.length > strlen) {

		newstr = str.substr(0, strlen);

	} else {

		newstr = str;

	}

	return newstr;

}

function byteLength (sStr) {

	aMatch = sStr.match(/[^\x00-\x80]/g);

	return (sStr.length + (! aMatch ? 0 : aMatch.length));

}

function strLen(str) {

	var charset = document.charset; 

	var len = 0;

	for(var i = 0; i < str.length; i++) {

		len += str.charCodeAt(i) < 0 || str.charCodeAt(i) > 255 ? (charset == "utf-8" ? 3 : 2) : 1;

	}

	return len;

}