Ctrl + Enter提交前检测的代码

<HTML> 
<HEAD> 
<title>QuickPost</title> 
<META http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<script language="javascript"> 
    //提交检测 
    function SendForm() 
    { 
        with(document.forms[0]) 
        { 
            var nr = document.all.Content.value; 
            //nr = nr.replace(/[\r\n]/g, ""); 
            if(nr == '') 
                { 
                    alert('请输入回复内容!'); 
                    document.all.Content.focus(); 
                    return false; 
                } 
            // 二个按扭失效 
            Send.disabled = true; 
            Reset.disabled = true; 
        } 
    }   
    // 快捷提交 
    function quickpost(){ 
        if(document.all){ 
            if((event.ctrlKey && window.event.keyCode == 13)||(event.altKey && window.event.keyCode == 83)) 
                document.all.Send.click(); 
        } 
    } 
</script> 
</HEAD> 
    <body> 
        <form name="Form1" method="post" action="" id="Form1">             
             
            <textarea name="Content" rows="7" id="Content" onkeydown="quickpost();" cols="40" style="border:1px solid #CCCCCC"></textarea> 
                <SPAN id="message" style="font-size:12px; COLOR: red">按 Ctrl+Enter 直接提交</SPAN> 
                <INPUT class="button" id="Send" onclick="SendForm();" type="button" value="提 交" name="Send" style="padding-right:5px;border:1px solid #CCCCCC" /> 
                <INPUT id="Reset" type="Reset" value="消 除"  style="border:1px solid #CCCCCC" /> 
             
        </form> 
    </body> 
</HTML>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]