var imgDesc   = "";
var scale       = 0;
var original     = 0;
var change    = 0;
var iratio       = 0;
var objImg     = null;

window.onload = function()
{
  objImg = ifm_show_prd.document.getElementById("objImg");
  objImg.src =  imgurl;
  document.getElementById("desc_div").innerHTML = imgDesc;
}

function doZoomIn()
{
  if(original == 0)
  {
    original  =objImg.width;
    scale     =objImg.width;
    iratio     =objImg.width/objImg.height;
  }

  if(scale-original > 2048) return false;

  scale    += 100;
  change  += 100;
  //if(change > 100) {change = 0; return false;}
  objImg.width  = scale;
  objImg.height = scale/iratio;
 // window.setTimeout("doZoomIn()",0);
  return true;
}

function doZoomOut()
{
  if(original == 0)
  {
    original  = objImg.width;
    scale     = objImg.width;
    iratio     =objImg.width/objImg.height;
  }

  if(scale <= 100) return false;
  scale    -= 100;
  change += 100;

 // if(change > 100) {change = 0; return false;}
  objImg.width = scale;
  objImg.height = scale/iratio;
  //window.setTimeout("doZoomOut()",50);
  return true;
}

function doReset()
{
    if(original == 0)
    {
        original  = objImg.width;
        scale     = objImg.width;
        iratio     = objImg.width/objImg.height;
    }
    else
    {
      objImg.width  = original;
      objImg.height   = original/iratio;
      scale              = original;
    }

  return true;
}


var last_img_btn_chg_prd_over = null;
var last_img_btn_chg_prd_click = null;
function ImgBtnChgPrd_Mouseover(obj)
{
    if(last_img_btn_chg_prd_over!=null)
    {
    last_img_btn_chg_prd_over.className='img_btn_chg_prd';
    last_img_btn_chg_prd_over=obj;
    obj.className='img_btn_chg_prd_active';
    }
}



function ImgBtnChgPrd_Click(obj,largepictureurl)
{
    if(last_img_btn_chg_prd_click!=null)
        last_img_btn_chg_prd_click.className='img_btn_chg_prd';
    last_img_btn_chg_prd_click=obj;

    if(last_img_btn_chg_prd_over==last_img_btn_chg_prd_click)
        last_img_btn_chg_prd_over=null;

    obj.className='img_btn_chg_prd_active';
     objImg.src=largepictureurl;

        original=objImg.width;
        scale=objImg.width;
        iratio=objImg.width/objImg.height;
}