/* 切换用户登录框 */
function switch_user(){
	art.dialog.open('\\cn\\control\\switch_user.jsp', {
		title: '切换用户',
	    lock:true,
	    fixed: true,
	    resize: false,
	    // 在open()方法中，init会等待iframe加载完毕后执行
	    init: function () {
	    	var iframe = this.iframe.contentWindow;
	    	var top = art.dialog.top;// 引用顶层页面window对象
	        var username = iframe.document.getElementById('login-form-username');
	        //username.value = 'guest';
	        setTimeout(function () {
	        	username.select();
	        }, 80);
	        //top.document.title = '切换用户';
	    },
	    button:[
	            {
			    	name:'切换',
			    	focus:true,
			    	callback: function () {
				    	var iframe = this.iframe.contentWindow;
				    	if (!iframe.document.body) {
				    		art.dialog.tips('iframe还没加载完毕呢');
				        	return false;
				        };
				    	var form = iframe.document.getElementById('login-form'),
				            username = iframe.document.getElementById('login-form-username'),
				    		password = iframe.document.getElementById('login-form-password');
				        if (check(username) && check(password)) form.submit();
				       	return false;
			    	}
	            },
			    {
		    		name:'取消',
		    		callback:function(){
		    			art.dialog.tips('您取消了操作！',1.5,false);
		    			return true;
		    		}
			    }
	            ]
	});
	// 表单验证
	var check = function (input) {
	    if (input.value === '') {
	        inputError(input);
	        input.focus();
	        return false;
	    } else {
	        return true;
	    };
	};
	// 输入错误提示
	var inputError = function (input) {
	    clearTimeout(inputError.timer);
	    var num = 0;
	    var fn = function () {
	        inputError.timer = setTimeout(function () {
	            input.className = input.className === '' ? 'login-form-error' : '';
	            if (num === 5) {
	                input.className === '';
	            } else {
	                fn(num ++);
	            };
	        }, 150);
	    };
	    fn();
	};

}