function changeContent(){
	document.getElementById("back").style.visibility="visible";
	if ((document.getElementById("ind").style.visibility)=="hidden"){
		document.getElementById("ind").style.visibility="visible";
		document.getElementById("gen").style.visibility="hidden";
		document.getElementById("back").src="dev0pics/content/back.jpg";
	}
	else{
		document.getElementById("ind").style.visibility="hidden";
		document.getElementById("gen").style.visibility="visible";
		document.getElementById("back").src=backrev.src;
	}
}