document.write('<a href="/peixun/"><IMG src="/ggao/img/cy.gif" border="0" width=590 height=80></a>');

function checkdata(form)   
{
	if (form.username.value==""){
		alert("请输入学员代码！");
		form.username.focus();
		return false;  
	}
	if (form.password.value==''){
		alert("请输入密码！");
		form.password.focus();
		return false;  
	}
	if (form.check.value=='右侧数字' || form.check.value==''){	
		alert("为保证广大学员密码的安全性，防止有人恶意盗取网校学员代码和密码，学员登录前必须在“验证码输入框”中输入其右侧当前4位数字！");
		form.check.focus();
		return false;  
	}
	var url = document.getElementById('CCverifycode').src;
	form.submit();
	return false;
}
function chgverify(url){
	document.login_form.check.value='';
	url = url + '?&' + Math.random();
	document.getElementById('CCverifycode').src = url;
}