js代码

<script type="text/javascript" src="js/jquery.min.js"></script>
<script type="text/javascript" src="js/amazeui.min.js"></script>
<script type="text/javascript" src="js/zUI.js"></script>
<script type="text/javascript" src="js/wechat.js"></script>

<script type="text/javascript">
//三图标
window.onload=function(){
	function a(){
		var si1 = document.getElementById('si_1');
		var si2 = document.getElementById('si_2');
		var si3 = document.getElementById('si_3');
		si1.onclick=function(){
			si1.style.background="url(images/icon/head_2_1.png) no-repeat"
			si2.style.background="";
			si3.style.background="";
		};
		si2.onclick=function(){
			si2.style.background="url(images/icon/head_3_1.png) no-repeat"
			si1.style.background="";
			si3.style.background="";
		};
		si3.onclick=function(){
			si3.style.background="url(images/icon/head_4_1.png) no-repeat"
			si1.style.background="";
			si2.style.background="";
		};
	};
	function b(){
		var text = document.getElementById('input_box');
		var chat = document.getElementById('chatbox');
		var btn = document.getElementById('send');
		var talk = document.getElementById('talkbox');
		btn.onclick=function(){
			if(text.value ==''){
				alert('不能发送空消息');
			}else{
				chat.innerHTML += '<li class="me"><img src="'+'images/own_head.jpg'+'"><span>'+text.value+'</span></li>';
				text.value = '';
				chat.scrollTop=chat.scrollHeight;
				talk.style.background="#fff";
				text.style.background="#fff";
			};
		};
	};
	a();
	b();
};
</script>