单击按钮的值返回到文本框中
[code=HTML][/code]<head>
<title>无标题文档</title>
</head>
<body>
<script language="javascript">
function Insert(str) {  
var obj = document.getElementById('content');  
if(document.selection) {  
obj.focus();  
var sel=document.selection.createRange();  
document.selection.empty();  
sel.text = str;  
} else {  
var prefix, main, suffix;  
prefix = obj.value.substring(0, obj.selectionStart);  
main = obj.value.substring(obj.selectionStart, obj.selectionEnd);  
suffix = obj.value.substring(obj.selectionEnd);  
obj.value = prefix + str + suffix;  
}  
obj.focus();  
}  
</script>
<table width="630" height="55" border="0" cellpadding="0" cellspacing="0">
<tr><td>
<label>
<textarea id="content" name="textarea" style="width:500px; height:120px;"></textarea>
</label>
</td></tr>
<tr>
<td width="567" align="left" >
<input type="button" style="cursor:hand" onclick="javascript:Insert('急')" value="急 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('发')" value="发 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('求')" value="求 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('回')" value="回 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('货')" value="货 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('至')" value="至 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('车')" value="车 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('到')" value="到 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('要')" value="要 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('在')" value="在 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('剩')" value="剩 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('空')" value="空 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('装')" value="装 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('占')" value="占 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('或')" value="或 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('节')" value="节 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('大')" value="大 " />  
<input type="button" style="cursor:hand" onclick="javascript:Insert('小')" value="小 " />  
<input type="button" sty