//得到题目
//area:显示题目的区域inner_1,inner_2,inner_3
function getSubject(id){
	    var msg = Ext.get('inner_1'); 
	      msg.load({
	      url: '/wrongSubjects/getSubject/'+id+'/'+Number(new Date),	      
	      text: 'Updating...'
	    }); 
	    msg.show();
	    document.getElementById('buttons').style.visibility='visible';
}

//单选，选择操作
function s_select(item){
	position = document.getElementById('1');
	obj = position.getElementsByTagName('span');
	if (obj[item].className == 'selected'){
		obj[item].className = 'select';
		input_nodes = position.getElementsByTagName("input");
		input_nodes[0].value = '';
	}else{
		clear();
		obj[item].className = 'selected';
		input_nodes = position.getElementsByTagName("input");
		input_nodes['user_answer'].value = String.fromCharCode(65+Number(item));
	}
}
//多选，选择操作
function m_select(item){
	position = document.getElementById('1');
	obj = position.getElementsByTagName('span');
	if (obj[item].className == 'selected'){
		obj[item].className = 'select';
		input_nodes = position.getElementsByTagName("input");
		select_item = String.fromCharCode(65+Number(item));
		input_nodes['user_answer'].value = input_nodes['user_answer'].value.replace(select_item,'');
	}else{
		//clear();
		obj[item].className = 'selected';
		input_nodes = position.getElementsByTagName("input");
		input_nodes['user_answer'].value = input_nodes['user_answer'].value + String.fromCharCode(65+Number(item));
	}
}
//清除选择题选项
function clear(){
	position = document.getElementById('1');
	message_nodes=position.getElementsByTagName("span");
	num=message_nodes.length;
	for (i=0;i<num;i++ )
	{
	  message_nodes[i].className="select";
	}
}
//判断正误
function check(){
	position = document.getElementById('1');
	input_nodes = position.getElementsByTagName("input");
	
	//单选判断正误
	if(input_nodes['category'].value == 'simple_select'){
		
		answer_nodes = position.getElementsByTagName('h1');
		answer_nodes[0].style.visibility = 'visible';
	
		comment_nodes = position.getElementsByTagName('h2');
		if(comment_nodes){ comment_nodes[0].style.display = 'block'; }
	}
	//分析题判断正误
	if(input_nodes['category'].value == 'subjectives'){
		answer_nodes = position.getElementsByTagName('h2');
		answer_nodes[0].style.display = 'block';
	}
	//多选判断正误
	if(input_nodes['category'].value == 'multi_select'){
		answer_nodes = position.getElementsByTagName('h1');
		answer_nodes[0].style.visibility = 'visible';

		comment_nodes = position.getElementsByTagName('h2');
		if(comment_nodes){ comment_nodes[0].style.display = 'block'; }
	}
}

function gotoSubject(book,part,chapter,section){
	dataForm = document.subjects;
	dataForm.book.value = book;
	dataForm.part.value = part;
	dataForm.chapter.value = chapter;
	dataForm.section.value = section;
	dataForm.submit();
}


function AutoScroll(obj){

}

function getRemindInterval(){
	getRemind();
	setInterval('AutoScroll("#scrollDiv")',5000);
}

function interval(){
	changeFontSize($size);
	changeBgColor($color);
	
	document.getElementById('size').value = $size;
	document.getElementById('color').value = $color;	
}

function getRemind() { 
	var msg1 = Ext.get('remind'); 
	      msg1.load({
	      url: '/subjects/getRemind/<?= $book ?>/0/0/0',
		  params:'',
	      text: 'Updating...'
	    }); 
	    msg1.show(); 
	    
} 
function changeFontSize(value){
	document.body.style.fontSize=value+'px';
}

function changeBgColor(value){
	document.body.style.backgroundColor=value;
}
//导航菜单
function contrl_menu(){
	var menu = document.getElementById("nav_menu");
	if(menu.style.display == 'none' || menu.style.display=='')
	menu.style.display = 'block';
	else
	menu.style.display = 'none';
}