// JavaScript Document
var pre_ids=new Array();
var all_imgs=new Array();
var x=0;
var y=0;
var q=0;
var p;
var v;
var imgs;

function chk() {
imgs=document.getElementById('prj_imgs').getElementsByTagName('img');

for (i=0; i<imgs.length; i++) {
all_imgs[q]=new Array();
all_imgs[q][0]=i;

  if (imgs[i].width>400 || imgs[i].style.display=="none"){
    imgs[i].id='big_img_'+x;
    imgs[i].name=x;
    all_imgs[q][1]=null;
    x++;
  }
  else {
    imgs[i].id='pre_img_'+y;
    imgs[i].name=y;
    //imgs[i].class
    //imgs[i].addEventListener("mouseover", setElementOpacity(imgs[i], 1), true );
    //imgs[i].attachEvent("onmouseout", setElementOpacity(imgs[i], 0.75) );
    all_imgs[q][1]=y;
    y++;
  }
  q++;
}

for (i=0; i<imgs.length/2; i++) {
var big_img=document.getElementById('big_img_'+i);
var opacity_one=document.getElementById('pre_img_'+i);
if (big_img.style.display!="none") {
setElementOpacity(opacity_one,1);
}
}

}

function chng_form(z) {
//var imgs=document.getElementById('content').getElementsByTagName('img');
var big_img=document.getElementById('big_img_'+z);
var opacity_one=document.getElementById('pre_img_'+z);

for (i=all_imgs.length-1; i>=0; i--) {
if (all_imgs[i][1]==z) {
p=all_imgs[i][0];

}
}
for (i=p; i>=0; i--) {
if (all_imgs[i][1]==null) {
v=all_imgs[i][0];

var visibl=imgs[v];

if (visibl.style.display!="none") {
visibl.style.display="none";

setElementOpacity(document.getElementById('pre_img_'+visibl.name),0.75);
break;
}
}
}

if (big_img.style.display=="none") {
  big_img.style.display="inline";
}
setElementOpacity(opacity_one,1);
}

fadeOpacity.addRule('opacityRule1', 0.7, 1, 30);
//fadeOpacity.addRule('opacityRule2', 1, 0.7, 30);