<!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>无标题文档</title>
<script language="javascript">
//设置信号强度
function setSign(count){
var tmpElement = document.getElementById("div_sign");
for(var i=0;i<5;i++){
tmpElement.children[i].style.backgroundColor = "#FFF";
if(i<=count-1){
if(count<2){
tmpElement.children[i].style.backgroundColor = "red";//一格时为红色
}else{
tmpElement.children[i].style.backgroundColor = "#00FF00";
}
}
}
}
</script>
</head>
<body onload="setSign()">
<div>
<div id="div_sign" style="width:30px; height:18px;border:1px solid transparent;">
<div style="width:5px;height:3px;margin-top:15px;border:1px solid #0e2d5f;"></div>
<div style="width:5px;height:6px;margin-top:-8px;margin-left:6px;border:1px solid #0e2d5f;"></div>
<div style="width:5px;height:9px;margin-top:-11px;margin-left:12px;border:1px solid #0e2d5f;"></div>
<div style="width:5px;height:12px;margin-top:-14px;margin-left:18px;border:1px solid #0e2d5f;"></div>
<div style="width:5px;height:15px;margin-top:-17px;margin-left:24px;border:1px solid #0e2d5f;"></div>
</div>
</div>
</body>
<script>
setInterval(function(){
setSign(Math.random()*6);
},1000);
</script>
</html>