<!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>
<title>无标题页</title>
</head>
<body>
<!--作为编辑区的iframe-->
<iframe style=" 100%; height:100" marginwidth="0" marginheight="0" frameborder="1" id="MsgFrame" src="about:blank"></iframe>
<br />
<input type="button" onclick="t('UnderLine')" value="下划线" />
<input type="button" onclick="t('bold')" value="粗体" id="Button1" />
<input type="button" onclick="t('JustifyLeft')" value="左对齐" />
<input type="button" onclick="t('JustifyCenter')" value="居中对齐" />
<input type="button" onclick="t('JustifyRight')" value="右对齐" />
<input type="button" onclick="t2()" value="增高" />
<input type="button" onclick="t3()" value="减少" />
<input type="button" onclick="ViewSource()" value="查看源代码" />
<script type="text/javascript" language="javascript">
//使iframe进入编辑状态。
var editor;
editor = document.getElementById("MsgFrame").contentWindow;
//window.frames["MsgFrame"].document.designMode="On"
editor.document.open();
editor.document.writeln('<html><head>');
editor.document.writeln("</head><body></body></html>");
editor.document.onclick = "alert()";
editor.document.close();
editor.document.designMode = 'On';
editor.document.contentEditable = true;
editor.document.charset="gb2312";
function t(s)
{
editor.document.execCommand(s,false,null);
}
//增高
function t2(){
var obj=window.frames["MsgFrame"].frameElement;
var height = parseInt(obj.offsetHeight);//获取iframe的高度
if (height+100 >= 100){
obj.height = height+100;
}
}
//减低
function t3(){
var obj=window.frames["MsgFrame"].frameElement;
var height = parseInt(obj.offsetHeight);
if (height-100 >= 100){
obj.height = height-100;
}
}
function ViewSource(){
document.getElementById("textarea1").value = document.getElementById("MsgFrame").contentWindow.document.lastChild.outerHTML;
}
</script>
<br/>
<textarea name="textarea1" rows="20" cols="100"></textarea>
</body>
</html>