Javascript实现简单的富文本编辑器附演示

 
<span style="font-size:14px;"><!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=utf-8"> 
<title>富文本编辑器</title> 
</head> 
<body> 
<fieldset> 
<legend>编辑区</legend> 
<div> 
<form> 
字体颜色： 
<select onchange="setFontColor(this)"> 
<option value="black">Black </option> 
<option value="red">Red </option> 
<option value="green">Green </option> 
<option value="blue">Blue </option> 
</select> 
字体样式： 
<select onchange="setFontStyle(this)"> 
<option value="bold">Bold </option> 
<option value="italic">Italic </option> 
<option value="underline">Underline </option> 
<option value="striketthrough">StriketThrough </option> 
</select> 
字体名称： 
<select onchange="setFontFamily(this)"> 
<option value="serif">Serif </option> 
<option value="sans-serif">Sans-serif </option> 
<option value="monospace">Monospace </option> 
<option value="comic sans ms">Comic Sans </option> 
</select> 
</form> 
</div> 
<br/> 
<div id="editableText" contenteditable="true" style="width:400px;min-height:100px;border:2px dashed #ccc"></div> 
</fieldset> 
<script type="text/javascript"> 
function setFontColor(obj) 
{ 
document.execCommand("forecolor",false,obj.value); 
} 
function setFontStyle(obj) 
{ 
document.execCommand(obj.value,false,null); 
} 
function setFontFamily(obj) 
{ 
document.execCommand("fontname",false,obj.value); 
} 
</script> 
</body> 
</html></span>

在线演示：http://jsfiddle.net/Web_Code/nPNv3/embedded/result/ 不足之处还请谅解，提出指正方法

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