function checklogin() {
	var usernameval = $('#username').val();
	usernameval     = ToSbcCase(usernameval);
	$('#username').val(usernameval)
	var userpwdval  = $('#userpwd').val();
	var authval     = $('#authval').val();
	
	if(usernameval == '' || userpwdval == '') {
		$('#loginmsg').html('<font color="#FF0000">请输入用户名及密码!</font>');
		return false;
	}
	
	if(authval == '') {
		$('#loginmsg').html('<font color="#FF0000">请输入验证码!</font>');
		return false;		
	}
	
	var params = {
		username:usernameval,
		userpwd:userpwdval,
		authcode:authval
	};
	
	$.post('../login/?Command=CheckLogin', params, function(data) {		
		if (data.success == true) {
            window.location.reload();
		} else {
            $('#loginmsg').html('<font color="#FF0000">'+data.msg+'</font>');
		}
	}, 'json');	
	
}

function ToSbcCase(str) { 
 var tmp = ""; 
 for(var i=0;i<str.length;i++) { 
	 if(str.charCodeAt(i)>65248&&str.charCodeAt(i)<65375) { 
	    tmp += String.fromCharCode(str.charCodeAt(i)-65248); 
	 } else { 
	    tmp += String.fromCharCode(str.charCodeAt(i)); 
	 } 
 } 
 return tmp; 
}