<!--
	var username='';
	var the_cookie=document.cookie;
	var each_cookie=the_cookie.split('; ');
	for(var i=0;i<each_cookie.length;i++)
	{
		var  each_value=each_cookie[i].split('=');
		if(each_value[0]=='username')
			username=each_value[1];
	}
    function login_check()
    {
     if(document.login.username.value=="")
        {alert("请输入ID!");
        return false}
     else if(document.login.username.value.length<5 || checkname(document.login.username.value)==false)
        { alert("此ID不存在!");
        return false}
     else if(document.login.password.value=="")
       { alert("请输入登录密码!");
        return false}
      else if(document.login.password.value.length<8)
         {alert("密码错误!");
         return false}
	  
    }


function checkname(str){
	var valid_char="0123456789abcdefghijklmnopqrstuvwxyz_-.ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	var flag=0;
	
	
	{
    	
		{
        	
       	}
		
		{
			
  	 	}	
		
	}
}


{
	
	{
		
		
		
	}
}