function backimgselect(ElemID) {
	var backImage = new Array(); 
	backImage[0] = "Ghepard.jpg";
	backImage[1] = "Forest.jpg";
	backImage[2] = "Dice.jpg";
	backImage[3] = "InGoodHands.jpg";
	backImage[4] = "SmallPlant.jpg";
	backImage[5] = "Relax.jpg";
	backImage[6] = "WatchWheels.jpg";
	backImage[7] = "Overtake.jpg";
	backImage[8] = "Train.jpg";
	backImage[9] = "Success.jpg";
	backImage[10] = "Hands.jpg";
	backImage[11] = "Health.jpg";
	backImage[12] = "SeaTower.jpg";
	backImage[13] = "Growth.jpg";
	backImage[14] = "IdeasValue.jpg";
	backImage[15] = "Repair.jpg";
	backImage[16] = "ManageChange.jpg";
	backImage[17] = "Takeoff.jpg";
	backImage[18] = "UpperPlace.jpg";
	backImage[19] = "NorthPole.jpg";
	backImage[20] = "ProblemSolve01.jpg";
	backImage[21] = "ProblemSolve02.jpg";
	backImage[22] = "ProblemSolve03.jpg";
	backImage[23] = "PitStop.jpg";
	backImage[24] = "Concert.jpg";
	backImage[25] = "Mill.jpg";
	backImage[26] = "TeamPlay.jpg";
	backImage[27] = "Balance.jpg";

	//	backImage[4] = "Landscape.jpg";
	//  backImage[4] = "Pool.jpg";
	//  backImage[3] = "Road.jpg";
	//  backImage[7] = "Swim.jpg";
	//  backImage[9] = "FastTrain.jpg";
	//  backImage[2] = "Golf.jpg";
	
	WI = Math.floor(Math.random() * 28);
	if (WI >= 29)
		WI = WI-29;

    var el = document.getElementById(ElemID);
    el.style.backgroundImage = 'url(images/intro/'+backImage[WI]+')';
}

function toggle(div_id) {
	var el = document.getElementById(div_id);
	if ( el.style.display == 'none' ) {	el.style.display = 'block';}
	else {el.style.display = 'none';}
}
function blanket_size(popUpDivVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportheight = window.innerHeight;
	} else {
		viewportheight = document.documentElement.clientHeight;
	}
	if ((viewportheight > document.body.parentNode.scrollHeight) && (viewportheight > document.body.parentNode.clientHeight)) {
		blanket_height = viewportheight;
	} else {
		if (document.body.parentNode.clientHeight > document.body.parentNode.scrollHeight) {
			blanket_height = document.body.parentNode.clientHeight;
		} else {
			blanket_height = document.body.parentNode.scrollHeight;
		}
	}
	var blanket = document.getElementById('blanket');
	blanket.style.height = blanket_height + 'px';
	var popUpDiv = document.getElementById(popUpDivVar);
	popUpDiv_height=blanket_height/2-200;//150 is half popup's height
	popUpDiv.style.top = popUpDiv_height + 'px';
}
function window_pos(popUpDivVar) {
	if (typeof window.innerWidth != 'undefined') {
		viewportwidth = window.innerHeight;
	} else {
		viewportwidth = document.documentElement.clientHeight;
	}
	if ((viewportwidth > document.body.parentNode.scrollWidth) && (viewportwidth > document.body.parentNode.clientWidth)) {
		window_width = viewportwidth;
	} else {
		if (document.body.parentNode.clientWidth > document.body.parentNode.scrollWidth) {
			window_width = document.body.parentNode.clientWidth;
		} else {
			window_width = document.body.parentNode.scrollWidth;
		}
	}
	var popUpDiv = document.getElementById(popUpDivVar);
	window_width=window_width/2-450;//150 is half popup's width
	popUpDiv.style.left = window_width + 'px';
}
function popup(windowname) {
    
    backimgselect(windowname); // Matteo 2010-08-10-n
    
	blanket_size(windowname);
	window_pos(windowname);
	toggle('blanket');
	toggle(windowname);		
}