// JavaScript Document
function changeLayout(showid){
	document.getElementById("infoLayout").style.display="none";
	document.getElementById("galleryLayout").style.display="none";
	document.getElementById("articleLayout").style.display="none";
	document.getElementById("info_btn").className="info_btn";
	document.getElementById("gallery_btn").className="gallery_btn";
	document.getElementById("article_btn").className="article_btn";
	document.getElementById(showid+"Layout").style.display="block";
	document.getElementById(showid+"_btn").className=showid+"_btn_actived";
	if((showid=="info")&&($("birthplace").getCoordinates().height<$("birthplace_wrap").getCoordinates().height)){
		$("downbtn").style.display="none";
		$("upbtn").style.display="none";
	}
}
function changePage(state){
	var pagesize=10;
	var list=$("galleryLayout").getElementsByTagName("li");
	if(state=="pre") currentPage--; else currentPage++;
	var pagenum=parseInt(list.length/pagesize);
	var firstnum=(currentPage-1)*pagesize;
	var lasttnum=(currentPage-1)*pagesize+pagesize;
	if(lasttnum>list.length) lasttnum=list.length;
	for(i=0;i<list.length;i++){
		list[i].style.display="none";
	}
	for(i=firstnum;i<lasttnum;i++){
		list[i].style.display="block";
	}
	$("prepage_btn").innerHTML='<a href="javascript:changePage(\'pre\');">Preview</a>';
	$("nextpage_btn").innerHTML='<a href="javascript:changePage(\'next\');">Next</a>';
	if(currentPage<=1) $("prepage_btn").innerHTML="Preview";
	if(currentPage>pagenum) $("nextpage_btn").innerHTML="Next";
}
function changePage2(state){
	var pagesize=3;
	var list=$("articleLayout").getElements(".article");
	if(state=="pre") currentPage--; else currentPage++;
	var pagenum=parseInt(list.length/pagesize);
	var firstnum=(currentPage-1)*pagesize;
	var lasttnum=(currentPage-1)*pagesize+pagesize;
	if(lasttnum>list.length) lasttnum=list.length;
	for(i=0;i<list.length;i++){
		list[i].style.display="none";
	}
	for(i=firstnum;i<lasttnum;i++){
		list[i].style.display="block";
	}
	$("prepage2_btn").innerHTML='<a href="javascript:changePage2(\'pre\');">Preview</a>';
	$("nextpage2_btn").innerHTML='<a href="javascript:changePage2(\'next\');">Next</a>';
	if(currentPage<=1) $("prepage2_btn").innerHTML="Preview";
	if(currentPage>pagenum) $("nextpage2_btn").innerHTML="Next";
}
function scolldown(){
	$("birthplace").style.top=movesize+"px";
	$("upbtn").className="upbtn";
	movesize--;
	if(($("birthplace").getCoordinates().height-$("birthplace_wrap").getCoordinates().height)<-movesize){
		$("downbtn").className="downbtn_2";
		clearInterval(downInt);
		movesize=-($("birthplace").getCoordinates().height-$("birthplace_wrap").getCoordinates().height);
	}
}
function scollup(){
	$("birthplace").style.top=movesize+"px";
	$("downbtn").className="downbtn";
	movesize++;
	if(movesize>0){
		clearInterval(upInt);
		$("upbtn").className="upbtn_2";
		movesize=0;
	}
}
function down(){
	downInt = setInterval("scolldown()",10);
}
function up(){
	upInt = setInterval("scollup()",10);
}
function clearup(){
	clearInterval(upInt);
}
function cleardown(){
	clearInterval(downInt);
}