function changePhoto (photo_id) {

if(photo_id){
var src = '<img src="../../img/' + photo_id + '" width="580" height="435" />';
} else {
var src = '<img src="../../img/work/w1.jpg" width="580" height="435" />';
}
document.getElementById("Result").innerHTML = src

switch(photo_id){
case "../img/work/w1.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w2.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w3.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w4.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w5.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w6.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w7.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w8.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
case "../img/work/w9.jpg":
document.getElementById('photo_title').innerHTML = '';
document.getElementById('photo_text').innerHTML = '';
break;
}
}