aInstall = new Array();
aInstall[1] = "images/installation/big/1.jpg";
aInstall[2] = "images/installation/big/2.jpg";
aInstall[3] = "images/installation/big/3.jpg";
aInstall[4] = "images/installation/big/4.jpg";
aInstall[5] = "images/installation/big/5.jpg";
aInstall[6] = "images/installation/big/6.jpg";
aInstall[7] = "images/installation/big/7.jpg";

oInstall = new Object();
for (iImage = 0; iImage < aInstall.length; iImage++) {
	oInstall[iImage] = new Image();
	oInstall[iImage].src = aInstall[iImage];
}

function install_click(id) {
	document.getElementById("install_big_pic").src = oInstall[id].src;
}