<textarea name="urls" id="urls" ...<input type="button" onclick="btn_onclick()" ...function btn_onclick()
{
document.getElementById("urls").value += "http://abc.com.cn" + "\r\n";
}
{
document.getElementById("urls").value += "http://abc.com.cn" + "\r\n";
}
<input type="text" name="url" id="url" size="30">
<textarea name="urls" id="urls" ...<input type="button" onclick="btn_onclick()" ...function btn_onclick()
{
document.getElementById("urls").value += document.getElementById("url").value + "\r\n";
}
<textarea name="urls" id="urls" ...<input type="button" onclick="btn_onclick()" ...function btn_onclick()
{
document.getElementById("urls").value += document.getElementById("url").value + "\r\n";
}