function show(tab_id) {
	document.getElementById('presentation').style.display = "none";
	document.getElementById('technical_data').style.display = "none";
	document.getElementById('favorites').style.display = "none";
	document.getElementById('tip_a_friend').style.display = "none";
   	document.getElementById(tab_id).style.display = "block";
}

/**
 *
 * @access public
 * @return void
 **/
function show_watch(pictureName){

	var idx = 0;
	if (document.getElementById('view_360') != null) {
		document.getElementById('view_360').style.display = "none";
	}
	while (document.getElementById("picture_" + idx) != null){
		document.getElementById("picture_" + idx).style.display = "none";
		idx++;
	}
	document.getElementById(pictureName).style.display = "block";
}

function submitForm(formName){
	document.forms[formName].submit()
}