function hideElement_(elmID)
{
	for(i = 0; i < document.getElementsByTagName( elmID ).length; i++ )
	{
		obj = document.getElementsByTagName( elmID )[i];
		if( !obj || !obj.offsetParent )
		{
			continue;
		}
		obj.style.visibility = "hidden";
	}
}
 
function showElement_(elmID)
{
	for( i = 0; i < document.getElementsByTagName(elmID).length; i++ )
	{
		obj = document.getElementsByTagName( elmID )[i];
		
		if( !obj || !obj.offsetParent )
		{
			continue;
		}
		obj.style.visibility = "";
	}
}
function showBox(name)
{
		
	hideElement_("SELECT");
	
	var _y=document.body.scrollTop;
	var _x=document.body.scrollLeft;
	document.getElementById(name).style.left='250px';
	document.getElementById(name).style.top='200px';
	document.getElementById(name).style.display='block';
	
}
function closeBox(name)
{
	showElement_("SELECT");
	document.getElementById(name).style.display='none';
}

function add_user(user_id)
{
		var uid=user_id;
		var user_value=document.getElementById('sendto').value;
		if(user_value=='')
		{
			
			document.getElementById('sendto').value=user_id;
			
		}else{
			
			var sss=user_value.indexOf(user_id);
			
			if (user_value.indexOf(user_id)==-1)
			{
				document.getElementById('sendto').value=user_value + "," + user_id;
			}
			else
			{
				alert('您已经选择了此收件人');	
			}
		}
		
}

function fav_add_item(tags_name)
{
	var tag=document.form3.tag.value;
	if (tag==""){
		document.form3.tag.value=tags_name;
	}else{
		test = new Array();
		test = tag.split(" ");
		var i = test.length;	
		if(i < 5)
		{
			for(j = 0; j < i; j++)
			{
				if(test[j] == tags_name)
				{
					alert("不能重复选择标签！");	
					return false;
				}
			}
			document.form3.tag.value=tag+" "+tags_name;
		}
		else
		{
			alert("最多只能填入5个标签！");	
			return false;
		}
	}
}

function change(id,name,co){
  for(i=1;i<=co;i++){
   class_name=name+i;
   class_name2=name+"_"+i;
   if (id==i){
    document.getElementById(class_name).style.display="block";
    document.getElementById(class_name2).className=name+"_yes";
   }else{
    document.getElementById(class_name).style.display="none";
    document.getElementById(class_name2).className=name+"_no";
   }
  }
 }


function review_show(id)
{
	img=new Image();
	lang_review = 'lang_review_'+id;
	short_review = 'short_review_'+id;
	img='img_'+id;
	show_hide=document.getElementById(lang_review).style.display;
	if(show_hide=='none'){
		document.getElementById(img).src="images/common/hide.gif";
        document.getElementById(lang_review).style.display="block";	
        document.getElementById(short_review).style.display="none";	
		document.getElementById(img).title="收缩书评";
		document.getElementById(img).alt="收缩书评";
	}else{
		document.getElementById(img).src="images/common/show.gif";
        document.getElementById(lang_review).style.display="none";	
        document.getElementById(short_review).style.display="block";
		document.getElementById(img).title="展开书评";
		document.getElementById(img).alt="展开书评";
	}
}

function bookinfo_show(id)
{
	links=new Image();
	lang_bookinfo = 'lang_bookinfo_'+id;
	short_bookinfo = 'short_bookinfo_'+id;
	links='link_'+id;
	show_hide=document.getElementById(lang_bookinfo).style.display;
	if(show_hide=='none'){
        document.getElementById(short_bookinfo).style.display="none";
		document.getElementById(lang_bookinfo).style.display="block";
	}else{
        document.getElementById(lang_bookinfo).style.display="none";	
        document.getElementById(short_bookinfo).style.display="block";
	}
}

function changeFontsize(type)
{
	if(type=='1'){
		document.getElementById('change_font_size_1').style.fontSize="14px";
		document.getElementById('change_font_size_2').style.fontSize="14px";
	}else{
		document.getElementById('change_font_size_1').style.fontSize="12px";
		document.getElementById('change_font_size_2').style.fontSize="12px";
	}
}