/**
*	zobrazi obrazek v divu
*/
function div_image_show(img_width, img_height, img_path, mouse) {
	var screen_width = 0;
	var screen_height = 0;
	/*
	if (typeof(window.innerHeight) != 'undefined')
		screen_height = window.innerHeight;
	else
		screen_height = document.body.offsetHeight;
		
	if (typeof(window.innerHeight) != 'undefined')
		screen_width = window.innerWidth;
	else
		screen_width = document.body.offsetWidth;
		*/

	screen_width = getWindowWidth();
	screen_height = getWindowHeight();
				
	
	var left = parseInt((screen_width - img_width) / 2);
	if (left < 0)
		left = 0;
	//+ mouseY -50
	var top = parseInt((screen_height - img_height + (mouse?mouseY:0)) / 2);
	if (top < 0)
		top = 0;
		
		
	var img = document.getElementById('div_image_img');
	img.src = img_path;	
		
	var div = document.getElementById('div_image');
	div.style.display = 'block';
	div.style.width = img_width + 'px';
	div.style.height = img_height + 'px';
	div.style.top = top + 'px';
	div.style.left = left + 'px';
}

// skryje obrazkovy div
function div_image_hide() {
	var div = document.getElementById('div_image');
	div.style.display = 'none';
}