function showImage(this_pre)
{
document.getElementById("photoimage").src = "/images/norm" + this_pre.src.substring(this_pre.src.length-10, this_pre.src.length-3) + "jpg";
}


function cursorHand(this_link)
{
this_link.style.cursor = "hand";
this_link.style.cursor = "pointer";
}


function showBigImage(this_link)
{
this_link.href = document.getElementById("photoimage").src.substring(0, document.getElementById("photoimage").src.length-14) + document.getElementById("photoimage").src.substring(document.getElementById("photoimage").src.length-9, document.getElementById("photoimage").src.length) ;
}


function showContBlock(k,l,m)
{

document.getElementById("nav1").className = '';
document.getElementById("nav2").className = '';
document.getElementById("nav3").className = '';

document.getElementById("datablock" + k).style.display = "block";
document.getElementById("datablock" + l).style.display = "none";
document.getElementById("datablock" + m).style.display = "none";

var sel = k;

document.getElementById("nav" + k).className = 'sel';

}