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Js实现无刷新删除内容
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Js实现无刷新删除内容

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>仿腾讯微博效果</title>
<style type="text/css">
body,div,h2,h3,ul,li,p{margin:0;padding:0;}
a{text-decoration:none;}
a:hover{text-decoration:underline;}
ul{list-style-type:none;}
body{color:#333;background:#3c3a3b;font:12px/1.5 \5b8b\4f53;}
#msgBox{width:500px;background:#fff;border-radius:5px;margin:10px auto;padding-top:10px;}
#msgBox form h2{font-weight:400;font:400 18px/1.5 \5fae\8f6f\96c5\9ed1;}
#msgBox form{background:url() repeat-x 0 bottom;padding:0 20px 15px;}
#userName,#conBox{color:#777;border:1px solid #d0d0d0;border-radius:6px;background:#fff url(img/inputBG.png) repeat-x;padding:3px 5px;font:14px/1.5 arial;}
#userName.active,#conBox.active{border:1px solid #7abb2c;}
#userName{height:20px;}
#conBox{width:448px;resize:none;height:65px;overflow:auto;}
#msgBox form div{position:relative;color:#999;margin-top:10px;}
#msgBox img{border-radius:3px;}
#face{position:absolute;top:0;left:172px;}
#face img{width:30px;height:30px;cursor:pointer;margin-right:6px;opacity:0.5;filter:alpha(opacity=50);}
#face img.hover,#face img.current{width:28px;height:28px;border:1px solid #f60;opacity:1;filter:alpha(opacity=100);}
#sendBtn{border:0;width:112px;height:30px;cursor:pointer;margin-left:10px;background:url(img/btn.png) no-repeat;}
#sendBtn.hover{background-position:0 -30px;}
#msgBox form .maxNum{font:26px/30px Georgia, Tahoma, Arial;padding:0 5px;}
#msgBox .list{padding:10px;}
#msgBox .list h3{position:relative;height:33px;font-size:14px;font-weight:400;background:#e3eaec;border:1px solid #dee4e7;}
#msgBox .list h3 span{position:absolute;left:6px;top:6px;background:#fff;line-height:28px;display:inline-block;padding:0 15px;}
#msgBox .list ul{overflow:hidden;zoom:1;}
#msgBox .list ul li{float:left;clear:both;width:100%;border-bottom:1px dashed #d8d8d8;padding:10px 0;background:#fff;overflow:hidden;}
#msgBox .list ul li.hover{background:#f5f5f5;}
#msgBox .list .userPic{float:left;width:50px;height:50px;display:inline;margin-left:10px;border:1px solid #ccc;border-radius:3px;}
#msgBox .list .content{float:left;width:400px;font-size:14px;margin-left:10px;font-family:arial;word-wrap:break-word;}
#msgBox .list .userName{display:inline;padding-right:5px;}
#msgBox .list .userName a{color:#2b4a78;}
#msgBox .list .msgInfo{display:inline;word-wrap:break-word;}
#msgBox .list .times{color:#889db6;font:12px/18px arial;margin-top:5px;overflow:hidden;zoom:1;}
#msgBox .list .times span{float:left;}
#msgBox .list .times a{float:right;color:#889db6;display:none;}
.tr{overflow:hidden;zoom:1;}
.tr p{float:right;line-height:30px;}
.tr *{float:left;}
</style>
<script type="text/javascript">
var get = {
byId: function(id) {
return typeof id === "string" "(^| )" + sClass + "( |$)");
var aElem = this.byTagName("*", oParent);
for (var i = 0; i < aElem.length; i++) reClass.test(aElem[i].className) && aClass.push(aElem[i]);
return aClass
},
byTagName: function(elem, obj) {
return (obj || document).getElementsByTagName(elem)
}
};
/*-------------------------- +
事件绑定, 删除
+-------------------------- */
var EventUtil = {
addHandler: function (oElement, sEvent, fnHandler) {
oElement.addEventListener "_" + sEvent + fnHandler] = fnHandler, oElement[sEvent + fnHandler]


= function () {oElement["_" + sEvent + fnHandler]()}, oElement.attachEvent("on" + sEvent, oElement[sEvent + fnHandler]))
},
removeHandler: function (oElement, sEvent, fnHandler) {
oElement.removeEventListener "on" + sEvent, oElement[sEvent + fnHandler])
},
addLoadHandler: function (fnHandler) {
this.addHandler(window, "load", fnHandler)
}
};
/*-------------------------- +
设置css样式
读取css样式
+-------------------------- */
function css(obj, attr, value)
{
switch (arguments.length)
{
case 2:
if(typeof arguments[1] == "object")
{ 
for (var i in attr) i == "opacity" "filter"] = "alpha(opacity=" + attr[i] + ")", obj.style[i] = attr[i] / 100) : obj.style[i] = attr[i];
}
else
{ 
return obj.currentStyle "opacity" "filter"] = "alpha(opacity=" + value + ")", obj.style[attr] = value / 100) : obj.style[attr] = value;
break;
}
};


EventUtil.addLoadHandler(function ()
{
var oMsgBox = get.byId("msgBox");
var oUserName = get.byId("userName");
var oConBox = get.byId("conBox");
var oSendBtn = get.byId("sendBtn");
var oMaxNum = get.byClass("maxNum")[0];
var oCountTxt = get.byClass("countTxt")[0];
var oList = get.byClass("list")[0];
var oUl = get.byTagName("ul", oList)[0];
var aLi = get.byTagName("li", oList);
var aFtxt = get.byClass("f-text", oMsgBox);
var aImg = get.byTagName("img", get.byId("face"));
var bSend = false;
var timer = null;
var oTmp = "";
var i = 0;
var maxNum = 140;

//禁止表单提交
EventUtil.addHandler(get.byTagName("form", oMsgBox)[0], "submit", function () {return false});

//为广播按钮绑定发送事件
EventUtil.addHandler(oSendBtn, "click", fnSend);

//为Ctrl+Enter快捷键绑定发送事件
EventUtil.addHandler(document, "keyup", function(event)
{
var event = event || window.event;
event.ctrlKey && event.keyCode == 13 && fnSend()
});

//发送广播函数
function fnSend ()
{
var reg = /^\s*$/g;
if(reg.test(oUserName.value))
{
alert("\u8bf7\u586b\u5199\u60a8\u7684\u59d3\u540d");
oUserName.focus()
}
else if(!/^[u4e00-\u9fa5\w]{2,8}$/g.test(oUserName.value))
{
alert("\u59d3\u540d\u75312-8\u4f4d\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u4e0b\u5212\u7ebf\u3001\u6c49\u5b57\u7ec4\u6210\uff01");
oUserName.focus()
}
else if(reg.test(oConBox.value))
{
alert("\u968f\u4fbf\u8bf4\u70b9\u4ec0\u4e48\u5427\uff01");
oConBox.focus()
}
else if(!bSend)
{
alert("\u4f60\u8f93\u5165\u7684\u5185\u5bb9\u5df2\u8d85\u51fa\u9650\u5236\uff0c\u8bf7\u68c0\u67e5\uff01");
oConBox.focus()
}
else
{
var oLi = document.createElement("li");
var oDate = new Date();
oLi.innerHTML = "<div class=\"userPic\"><img src=\"" + get.byClass("current", get.byId("face"))[0].src + "\"></div><div class=\"content\"><div class=\"userName\"><a href=\"javascript:;\">" + oUserName.value + "</a>:</div><div class=\"msgInfo\">" + oConBox.value.replace(/<[^>]*>|&nbsp;/ig, "") + "</div><div class=\"times\"><span>" + format(oDate.getMonth() + 1) + "\u6708" + format(oDate.getDate()) +


"\u65e5 " + format(oDate.getHours()) + ":" + format(oDate.getMinutes()) + "</span><a class=\"del\" href=\"javascript:;\">\u5220\u9664</a></div></div>";
//插入元素
aLi.length "form", oMsgBox)[0].reset();
for (i = 0; i < aImg.length; i++) aImg[i].className = "";
aImg[0].className = "current";

//将元素高度保存
var iHeight = oLi.clientHeight - parseFloat(css(oLi, "paddingTop")) - parseFloat(css(oLi, "paddingBottom"));
var alpah = count = 0;
css(oLi, {"opacity" : "0", "height" : "0"});

timer = setInterval(function ()
{
css(oLi, {"display" : "block", "opacity" : "0", "height" : (count += 8) + "px"});
if (count > iHeight)
{
clearInterval(timer);
css(oLi, "height", iHeight + "px");
timer = setInterval(function ()
{
css(oLi, "opacity", (alpah += 10));
alpah > 100 && (clearInterval(timer), css(oLi, "opacity", 100))
},30)
}
},30);
//调用鼠标划过/离开样式
liHover();
//调用删除函数
delLi()
}
};

//事件绑定, 判断字符输入
EventUtil.addHandler(oConBox, "keyup", confine);

EventUtil.addHandler(oConBox, "focus", confine);
EventUtil.addHandler(oConBox, "change", confine);

//输入字符限制
function confine ()
{
var iLen = 0; 
for (i = 0; i < oConBox.value.length; i++) iLen += oConBox.value.charAt(i).charCodeAt() > 255 "color", ""), oCountTxt.innerHTML = "\u8fd8\u80fd\u8f93\u5165", bSend = true) : (css(oMaxNum, "color", "#f60"),


oCountTxt.innerHTML = "\u5df2\u8d85\u51fa", bSend = false)
}
//加载即调用
confine();

//广播按钮鼠标划过样式
EventUtil.addHandler(oSendBtn, "mouseover", function () {this.className = "hover"});


//广播按钮鼠标离开样式
EventUtil.addHandler(oSendBtn, "mouseout", function () {this.className = ""});

//li鼠标划过/离开处理函数
function liHover()
{
for (i = 0; i < aLi.length; i++)
{
//li鼠标划过样式
EventUtil.addHandler(aLi[i], "mouseover", function (event)
{
this.className = "hover";
oTmp = get.byClass("times", this)[0];
var aA = get.byTagName("a", oTmp);
if (!aA.length)
{
var oA = document.createElement("a");

oA.innerHTML = "删除";
oA.className = "del";
oA.href = "javascript:;";
oTmp.appendChild(oA)
}
else
{
aA[0].style.display = "block";
}
});


//li鼠标离开样式
EventUtil.addHandler(aLi[i], "mouseout", function ()
{
this.className = "";
var oA = get.byTagName("a", get.byClass("times", this)[0])[0];
oA.style.display = "none"

})
}
}
liHover();

//删除功能
function delLi()
{
var aA = get.byClass("del", oUl);

for (i = 0; i < aA.length; i++)
{
aA[i].onclick = function ()
{
var oParent = this.parentNode.parentNode.parentNode;
var alpha = 100;
var iHeight = oParent.offsetHeight;
timer = setInterval(function ()
{
css(oParent, "opacity", (alpha -= 10));
if (alpha < 0)
{
clearInterval(timer);

timer = setInterval(function ()
{
iHeight -= 10;
iHeight < 0 && (iHeight = 0);
css(oParent, "height", iHeight + "px");
iHeight == 0 && (clearInterval(timer), oUl.removeChild(oParent))
},30)
} 
},30); 
this.onclick = null

} 
}
}
delLi();

//输入框获取焦点时样式
for (i = 0; i < aFtxt.length; i++)
{
EventUtil.addHandler(aFtxt[i], "focus", function ()
{this.className = "active"}); 
EventUtil.addHandler(aFtxt[i], "blur", function () {this.className = ""})
}

//格式化时间, 如果为一位数时补0
function format(str)
{
return str.toString().replace(/^(\d)$/,"0$1")
}

//头像
for (i = 0; i < aImg.length; i++)
{
aImg[i].onmouseover = function ()
{
this.className += " hover"
};
aImg[i].onmouseout = function ()
{
this.className = this.className.replace(/\s"")
};
aImg[i].onclick = function ()
{
for (i = 0; i < aImg.length; i++) aImg[i].className = "";
this.className = "current"

}
}
});
</script>
</head>


<body>
<div id="msgBox">
<form>
<h2>来 , 说说你在做什么 , 想什么</h2>
<div>
<input id="userName" class="f-text" value="" />
<p id="face"><img src="/UploadFiles/2021-04-02/face1.gif">


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