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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>test</title>
<script type="text/javascript">
//html 字符串拼写:字体样式 也可以拼img
var str1= "<span style='font-size:72px; color:#0C3'>"+ a +"</span>";
var str2= "<span style='font-size:72px; color:#0C3'>"+ b +"</span>";
var str3= "<span style='font-size:72px; color:#0C3'>"+ c +"</span>";
str = str1 + str2 + str3;
//最后将拼好的html代码插入指定位置
document.getElementById("ShowHere").innerHTML = str;
</script>
</head>
<body>
<div id="ShowHere"></div>
</body>
</html>
document.getElementsByTagName("p")[0].innerHTML="<font size='10' color='red'>"+test()+"</font>";
var picMap = {"上海":"xx/xx.gif","南京":"yy/yy.jpg"};
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>test</title>
<script type="text/javascript">
var a = "南京";
var b = "杭州";
var c = "上海";
//页面加载完毕执行函数
function DoShowInfo()
{
//html 字符串拼写:字体样式 也可以拼img
var str1= "<span style='font-size:72px; color:#0C3'>"+ a +"</span>";
var str2= "<span style='font-size:72px; color:#0C3'>"+ b +"</span>";
var str3= "<span style='font-size:72px; color:#0C3'>"+ c +"</span>";
str = str1 + str2 + str3
//最后将拼好的html代码插入指定位置
document.getElementById("ShowHere").innerHTML = str;
}
</script>
</head>
<body onload="DoShowInfo()">
<div id="ShowHere"></div>
</body>
</html>