js中页面设置字体

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <script type="text/javascript">
        //全选页面内容
        function selectAll() {
            document.execCommand("SelectAll",false);
        }
        //另存为
        function saveAs() {
            document.execCommand("SaveAs", true, "C:\\sample.htm");
        }
        //粗体
        function boldAll() {
            //首先选择页面文本
            document.execCommand("SelectAll", false);
            //切换粗体命令
            document.execCommand("Bold", false);
            //清除选择,恢复页面的状态
            document.execCommand("Unselect",false);
        }
        //弹出“打印”对话框
        function print() {
            document.execCommand("print");
        }
    </script>
</head>
<body style="overflow:auto; padding:0px;margin:0px;">
<div style="font-size:14px;color:White;font-family:Arial,@楷体; background-color:#6090DA; padding:4px 10px;">
你好
<script type="text/javascript">
    dt = new Date();
    document.write(",当前时间是");
    document.write(dt.toLocaleTimeString());
</script>
<br/>
<br/>
<input type="button" value="全选" οnclick="this.blur();selectAll();" />
<input type="button" value="保存" οnclick="this.blur();saveAs();" />
<input type="button" value="全文加粗" οnclick="this.blur();boldAll();" />
<input type="button" value="打印" οnclick="this.blur();print();" />


</div>

</body>
</html>



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