function f_validate() {

var username = document.getElementById("uname").value;

var passwd = document.getElementById("passwd").value;

var yzm = document.getElementById("yzm").value;

// var username=document.getElementsByName("uname")[0].value;

// var passwd=document.getElementsByName("passwd")[0].value;

var error = "";

if (username == "" || username == null || username == "请输入") {

// alert("用户名不能为空！");

error = error + "用户名不能为空！";

error = error + "n";

//return false;

} else if (username.length < 6) {

//alert("您的用户名长度小于6！");

error = error + "您的用户名长度小于6！";

error = error + "n";

//return false

} else if (username.length > 12) {

//alert("您的用户名长度大于12！");

error = error + "您的用户名长度大于12！";

error = error + "n";

// return false

}

if (passwd == "" || passwd == null) {

// alert("密码不能为空！");

error = error + "密码不能为空！";

error = error + "n";

//return false;

} else if (passwd.length < 6) {

// alert("您的密码长度小于6！");

error = error + "您的密码长度小于6！";

error = error + "n";

//return false

} else if (passwd.length > 12) {

// alert("您的密码长度大于12！");

error = error + "您的密码长度大于12！";

// return false

}

if (yzm == "" || yzm == null) {

// alert("密码不能为空！");

error = error + "验证码不能为空！";

error = error + "n";

//return false;

}

if (error == "") {

//window.location.href="h.html";

return true;

} else {

alert(error);

return false;

}

}

function setInfo() {

var username = document.getElementById("uname");

if (username.value == "" || username.value == null) username.value = "请输入";

}

function clearInfo() {

var username = document.getElementById("uname").value = "";

}

	用户名: 密 码: 验证码: 自动登录