function newImage(imgSrc){
 var imgName = new Image();
 imgName.src = imgSrc;
 return imgName;
}

function changeimg(imgName,imgLocation) {
 document[imgName].src = imgLocation ;
}

var preloadFlag = false;
function loadImages() {
	if (document.img) {
		soucasnost_o = newImage("img/m-soucasnost-o.gif");
		historie_o_= newImage("img/m-historie-o.gif");
		pronajmy_o = newImage("img/m-pronajmy-o.gif");
		fotogalerie_o = newImage("img/m-fotogalerie-o.gif");
		doporucujeme_o = newImage("img/m-doporucujeme-o.gif");
		kontakt_o = newImage("img/m-kontakt-o.gif");
		preloadFlag = true;
	}
}