JS控制网页中的回车键

<input name="username" type="text" size="20" value="" onkeydown="enterkey(this.name)" />

 

<input id="password" name="password" type="password" size="20" value="" onkeydown="enterkey(this.name)"/>

 

<input id="validation" name="checkCode" type="text"
         class="input" style="width: 60px;" onkeydown="enterkey(this.name)" />
        <img alt="验证码" width=60 height=22 align="absmiddle" border="0"
         src="<%=contextPath %>/CheckCode"  />

 

<a href="javascript:void(false);" id="login"
     onClick="javascript:loginF();"><img name="loginbtn1" src="<%=contextPath%>/jsp/portal/images/loginbtn1.jpg" width="80" height="20" border="0" alt=""></a>   //登录按钮由图片构成

 

function enterkey(ctrname) {
    try  {
        var el_keydown=window.event.srcElement;
        if(event.keyCode==13)
        {
            if ("checkCode" != ctrname) {
                window.event.keyCode=9;   //相当于TAB键作用（输入完一行按回车，跳到下一行）
            }else if ("checkCode" == ctrname) {
                loginF();
            }
        }
    }catch(e) {
        return;
    }
}