//function ShowImg1(i)
//    {
//        alert(i);        
//        document.getElementById("ImgBlank").style.visibility = "hidden";        
//        alert("ImgPP"+i);       
//        document.getElementById("ImgP" + i).style.visibility = "visible";
//        document.getElementById("ImgP" + i).style.display = "block";  
//        document.getElementById("ImgPP" - i).style.visibility = "hidden";
//        document.getElementById("ImgPP" - i).style.display = "none";
//                   
//        document.getElementById("ImgPPP" + i).style.visibility = "hidden";
//        document.getElementById("ImgPPP" + i).style.display = "none";
//    }
//function ShowImg2(i)
//    {
//        //alert("Image 2")
//        document.getElementById("ImgP" + i).style.visibility = "hidden";
//        document.getElementById("ImgP" + i).style.display = "none";
//        document.getElementById("ImgPP" + i).style.visibility = "visible";
//        document.getElementById("ImgPP" + i).style.display = "block";             
//        document.getElementById("ImgPPP" + i).style.visibility = "hidden";
//        document.getElementById("ImgPPP" + i).style.display = "none";
//    }
//function ShowImg3(i)
//    {
//        //alert("Image 3")
//        document.getElementById("ImgP" + i).style.visibility = "hidden";
//        document.getElementById("ImgP" + i).style.display = "none";
//        document.getElementById("ImgPP" + i).style.visibility = "hidden";
//        document.getElementById("ImgPP" + i).style.display = "none";             
//        document.getElementById("ImgPPP" + i).style.visibility = "visible";
//        document.getElementById("ImgPPP" + i).style.display = "block";
//    }
function CloseImg()
{
 document.getElementById("mainimage").style.visibility = "hidden";
 document.getElementById("mainimageblank").style.visibility = "visible";
}

function changeImage(filename)
{
   document.getElementById("mainimageblank").style.visibility = "hidden";
   document.getElementById("mainimage").style.visibility = "visible";
   document.getElementById('mainimage').src = filename;
}