//刷表验证码
	function Change()
	{
		document.getElementById('CodeImg').src="/inc/GetCode.asp?Noisy=4&Count=4&Width=58&Height=20&Angle=2&Offset=2&Border=3&BgColor=f4f4f4&Color=0372ac&time="+new Date(new Date().getTime()).toGMTString();
	}
	
	//登录
	function doLogin(params)
		{
		$('LoginMessage').update("正在验证身份请稍后...").show();
		var option = {
			method:'post',
			parameters: params,
			
			onSuccess:function(transport){
					
					if (transport.responseText == "loginok")
					{	
						$('form1').submit();
					}
					else
					{
					//alert(transport.responseText);
					$('LoginMessage').update("用户名或密码错误,登录失败!").setStyle({color:"red"}).show();
					return false;
					}
				}
			};
			
			new Ajax.Request('/ajax/do.ashx',option);
		}
	
	//表单验证
	function check() {
		
		if( $('form1').UserName.value.length==0) {
			$('LoginMessage').update("您忘记填写账号了").show();
			$('form1').UserName.focus();
			return false;
		}
		if($('form1').UserPwd.value.length==0 ) {
			$('LoginMessage').update("您忘记填写密码了!").show();
			$('form1').UserPwd.focus();
			return false;
		}
		if($('form1').Code.value.length==0 ) {
			$('LoginMessage').update("您忘记填写验证码了!").show();
			$('form1').Code.focus();
			return false;
		}

		var params = 'action=login&name=' + $F('UserName') + '&pwd='+ $F('UserPwd');

		doLogin(params);
	}
	
	
	//监测回车键提交登录
	try{
	Event.observe(window.document, 'keydown', function(event) {
				if(event.keyCode==13) {
					check();
				 }
	});
	}
	catch(e)
	{
		alert(e);
	}