function logout(){
			var oIframe = document.getElementById("_postproxy");
			var oDoc = oIframe.contentWindow || oIframe.contentDocument;
			if (oDoc.document) {
				oDoc = oDoc.document;
			}
			oDoc.location.href="http://www.bdall.com/bdall.passport.php?ac=logout";			
		}
		function ifloaded(type){			
			var oIframe = document.getElementById("_postproxy");
			var oDoc = oIframe.contentWindow || oIframe.contentDocument;
			if (oDoc.document) {
				oDoc = oDoc.document;
			}
			switch(type){
				case 'loginform':
					jQuery('#user_area').html(oDoc.getElementById('user_login').innerHTML);
					var oForm=document.getElementById('loginform');
					oForm.onsubmit=checkLogin;
					oForm.action='javascript:void(0);';
					break;
				case 'logined':
					jQuery('#user_area').html(oDoc.getElementById('user_logined').innerHTML);
					break;
				case 'logout':
					break;
				case 'error':
					alert(oDoc.getElementById('_error').innerHTML);
					oDoc.body.innerHTML="<form id='loginform' method='post'><input id='password' name='password'/><input id='username' name='username'/><input id='formhash' name='formhash'/></form>"
					break;
				default:
					
			}					
			
		}
		function checkLogin(){
			if(jQuery('#username').val()==''){ alert('请填写用户名！');return false;}
			var oIframe = document.getElementById("_postproxy");
			var oDoc = oIframe.contentWindow || oIframe.contentDocument;
			if (oDoc.document) {
				oDoc = oDoc.document;
			}
			oDoc.getElementById('username').value=jQuery('#username').val();
			oDoc.getElementById('password').value=jQuery('#password').val();
			oDoc.getElementById('formhash').value=jQuery('#formhash').val();
			oDoc.getElementById('loginform').action='http://www.bdall.com/bdall.passport.php?ac=login';
			oDoc.getElementById('loginform').submit();
			return false;
		}						
		document.write("<iframe src='http://www.bdall.com/bdall.passport.php?ac=iframeform'id='_postproxy' style='display:none;'></iframe>");