var img_H;
var img_top;
var div_imgTop;
var t;
//topBegin  
var topBegin = 0;
var topEnd = -145;
//c 
var c = 1.59;
function img_show(){
    div_imgTop = document.getElementById("div_imgTop");
    img_top = document.getElementById("img_top");
    img_H = img_top.height;
    clearTimeout(t);
    var fun_name = "img_showChange(" + Number(div_imgTop.style.top.replace("px",""))  + "," + c + ");";
    t = setTimeout(fun_name, 10);
}
function start2()
{
	img_show();
}

function start()
{
	setTimeout(start2, 10000);
}
function img_hide(){
    clearTimeout(t);
    var fun_name = "img_hiddenChange(" + Number(div_imgTop.style.top.replace("px",""))  + "," + c + ");";
    t = setTimeout(fun_name, 10);
}
function img_showChange(top, change_x)
{
    top = top +  (img_H / change_x )/c;
    if (img_H/change_x < 3)
    {
        change_x = img_H/3;
    }
    else
    {
        change_x = change_x*change_x;
    }
    
    if (top >= topBegin)
    {
       div_imgTop.style.top = topBegin;
    }
    else
    {
       var fun_name = "img_showChange(" + top + "," + change_x + ");";
       div_imgTop.style.top = top;
       t = setTimeout(fun_name,10);
    } 
}
function img_hiddenChange(top, change_x)
{
    top = top -  (img_H / change_x )/c;
    if (img_H/change_x < 3)
    {
        change_x = img_H/3;
    }
    else
    {  
        change_x = change_x*change_x;
    }
    
    if (top <= topEnd )
    {
       div_imgTop.style.top = topEnd;
    }
    else
    {
       var fun_name = "img_hiddenChange(" + top + "," + change_x + ");";
       div_imgTop.style.top = top;
       t = setTimeout(fun_name, 10);
    } 
}