// JavaScript Document

// ECON JS BOX
// by Netank.cn 
// 2011-06-29
// Tim.

function $D(num){
var d=document.getElementById('content'+num);
var h=d.offsetHeight;
var strs=document.getElementById("content"+num).clientHeight;
var maxh=strs;

function dmove(){
h+=50; //设置层展开的速度
if(h>=maxh){
d.style.height=strs+'px';
clearInterval(iIntervalId);
}else{
d.style.display='block';
d.style.height=h+'px';
}
}
iIntervalId=setInterval(dmove,2);
}

function $D2(num){
var d=document.getElementById('content'+num);
var strs=document.getElementById("content"+num).clientHeight;
var h=d.offsetHeight;
var maxh=strs;
function dmove(){
h-=50;//设置层收缩的速度
if(h<=0){
d.style.display='none';
clearInterval(iIntervalId);
}else{
d.style.height=h+'px';
}
}
iIntervalId=setInterval(dmove,2);
}
function $use(num){
var d=document.getElementById('content'+num);
var strs=document.getElementById("content"+num).getElementsByTagName("div").item(0).clientHeight;
alert(strs);
//var sb=document.getElementById('stateBut');
if(strs==0){
$D(num);
//sb.innerHTML='展开';
}else{
$D2(num);
//sb.innerHTML='收缩';
}
}
/////////////////////////////////////////////////////////////////////////////

function showdiv(objs){	
    //var obj=document.getElementById('content'+num);
	var obj=objs.parentNode.getElementsByTagName("div").item(0)
	var strfs=obj.style.display;
	//alert(strfs);
	if(strfs=='none'){
	obj.style.display="block";}
	else{
	obj.style.display="none";}
	}

////////tab切换////
function tab(num){
	for(var i=0;i<2;i++){
		document.getElementById("title_box").getElementsByTagName("a").item(i).className="";
		document.getElementById("tab_box").getElementsByTagName("div").item(i).style.display="none";
		}
		document.getElementById("title_box").getElementsByTagName("a").item(num).className="on";
		document.getElementById("tab_box").getElementsByTagName("div").item(num).style.display="block";
	}
	
//////////////////Picture geometric scaling

function AutoResizeImage(maxWidth,maxHeight,objImg){
var img = new Image();
img.src = objImg.src;
var hRatio;
var wRatio;
var Ratio = 1;
var w = img.width;
var h = img.height;
wRatio = maxWidth / w;
hRatio = maxHeight / h;
if (maxWidth ==0 && maxHeight==0){
Ratio = 1;
}else if (maxWidth==0){//
if (hRatio<1) Ratio = hRatio;
}else if (maxHeight==0){
if (wRatio<1) Ratio = wRatio;
}else if (wRatio<1 || hRatio<1){
Ratio = (wRatio<=hRatio?wRatio:hRatio);
}
if (Ratio<1){
w = w * Ratio;
h = h * Ratio;
}
objImg.height = h;
objImg.width = w;
}


//////Image change

function imgchange(url){
	document.getElementById("imgbig").src=url;
	}