// JavaScript Document

function toggleOverlay(overlay) {

    overlay.style.visibility = (overlay.style.visibility == "visible")? "hidden" : "visible";

    overlay.style.display = (overlay.style.display == 'block') ? 'none' : 'block';

}



function toggleDisplay(ele) {

    ele.style.display = (ele.style.display == 'block') ? 'none' : 'block';

}



function togglePopup(popup) {

    popup = document.getElementById(popup);

	if(document.all) popup.style.top = (document.body.scrollTop + 50)+"px";

	else popup.style.top = (window.scrollY + 50)+"px"; 

    var overlay = document.getElementById('overlay');

    toggleOverlay(overlay);

    toggleDisplay(popup);

}





function showVideo(pic) {

	var iframe = document.getElementById("popup_iframe");

        iframe.src = pic + ".html";

		document.getElementById("caption").firstChild.data = captionArray[pic];

        togglePopup('popup');

}





var captionArray = new Array(

"",

"",

'Video 2 - "Gas pump - Cry" (30 seconds)',

'Video 3 - "Gas pump - Scream" (30 seconds)',

'Video 4 - Alternative Transportation (2 minutes)',

'Video 5 - Low Car Diet (2 minutes)'



);