function PageScroll() {
	// umisti spravne indikator zaneprazdneni
	document.getElementById("busy").style.left = document.body.clientWidth/2 - document.getElementById("busy").clientWidth/2;
	document.getElementById("busy").style.top = document.body.scrollTop + (document.body.clientHeight/2 - document.getElementById("busy").clientHeight/2);
} // End of function: PageScroll

function PageResize() {
	PageScroll();
	document.getElementById("page").style.left = document.body.clientWidth/2 - 375;

/*
	var height1 = document.getElementById("left_section").clientHeight;
	if (height1<document.getElementById("center_section").clientHeight) height1 = document.getElementById("center_section").clientHeight;
	if (height1<document.getElementById("right_section").clientHeight) height1 = document.getElementById("right_section").clientHeight;
	document.getElementById("left_section").style.height = height1;
	document.getElementById("center_section").style.height = height1;
	document.getElementById("right_section").style.height = height1;
	var posY1 = document.getElementById("top_section").offsetTop + document.getElementById("top_section").clientHeight;
	document.getElementById("left_section").style.top = posY1;
	document.getElementById("center_section").style.top = posY1;
	document.getElementById("right_section").style.top = posY1;
	var posX1 = document.getElementById("left_section").offsetLeft;
	document.getElementById("left_section").style.left = posX1;
	var posX2 = posX1 + document.getElementById("left_section").offsetWidth;
	document.getElementById("center_section").style.left = posX2;
	var posX3 = posX2 + document.getElementById("center_section").offsetWidth;
	document.getElementById("right_section").style.left = posX3;
	var posY2 = posY1 + document.getElementById("center_section").offsetHeight;
	document.getElementById("bottom_section").style.top = posY2;
*/
	document.getElementById("page").style.visibility = 'visible';
	document.getElementById("busy").style.visibility = 'hidden';
	window.status = 'Optimalizováno pro prohlížeč Internet Explorer v rozlišení 1024x768 bodů.';
} // End of function: PageResize

function goToUrl(section,action,params) {
	document.getElementById("busy").style.visibility = 'visible';
	var changed = false;
	if (params != '') {
		params = params.split(',');
		for (i=0; i<params.length; i++) {
			param = params[i].split('=');
			if (eval('document.getElementById("'+param[0]+'")').value != param[1]) {
				eval('document.getElementById("'+param[0]+'")').value = param[1];
				changed = true;
			}
		}
	} else changed = true;
	document.getElementById("_section").value = section;
	document.getElementById("_action").value = action;
	document.getElementById("_mainForm").submit();
} // End of function: goToUrl 

/*
function checkSearchFor(buttonClicked) {
	if ((event.keyCode == 13) || (buttonClicked)) {
		if (document.all._searchFor.value.length < 2) {
			event.returnValue=false;
			alert('Hledaný řetězec musí být alespoň 2 znaky dlouhý.');
		} else {
			event.returnValue=false;
			evt.cancelBubble = true;
			goToUrl('commodity','search','');
		}
	}
}
*/

function keyPressed(evt) {
	var evt = (window.event) ? window.event : evt;
	var trg = (evt.srcElement) ? evt.srcElement : evt.target;
	var keyCode = (evt.keyCode) ? evt.keyCode : evt.which;
	var shiftKey = evt.shiftKey;
	var altKey = evt.altKey;
	var ctrlKey = evt.ctrlKey
	var keyVal = (shiftKey) ? String.fromCharCode(keyCode).toUpperCase() : String.fromCharCode(keyCode).toLowerCase();
	if (trg.name == "_search") {
		if (keyCode == 13) { // enter
			evt.cancelBubble = true;
			evt.returnValue = false;
			goToUrl('container','search','');
		}
	}
} // End of function: keyPressed