function raiseLayer(activeBlock1) {
	var a = document.getElementById(activeBlock1);
	var x = document.getElementsByTagName(a.nodeName);
	for (var i=0;i<x.length;i++) {
		if (x[i].id.substring(0,6) == '_block') {
			x[i].style.visibility = "hidden";
			x[i].style.zIndex = 0;
		} else if (x[i].id.substring(0,6) == '_inner') {
			x[i].style.visibility = "hidden";
			x[i].style.zIndex = 0;
		}
	}
	a.style.visibility = "visible";
	a.style.zIndex = 1;
}

function showBlock(activeBlock,hiddenBlocks) {
	var a = document.getElementById(activeBlock);
	var x = document.getElementsByTagName(a.nodeName);
	if (hiddenBlocks == null) {
		n = activeBlock.indexOf("_",1);
		hiddenBlocks = activeBlock.substring(0,n);
	} else n = hiddenBlocks.length;

	for (var i=0; i<x.length; i++) {
		if (x[i].id.substring(0,n) == hiddenBlocks) {
			x[i].style.display = "none";
		}
	}
	a.style.display = "block";
}

function changeTab(activeTab,tabClass,otherClass) {
	var x = document.getElementsByTagName('a');
	for (var i=0; i<x.length; i++) {
		if (x[i].id.substring(0,4) == "tab_") {
			x[i].className = otherClass;
		}
	}
	document.getElementById(activeTab).className = tabClass;
}

function hideBlock(activeBlock,hiddenBlocks) {
	var x = document.getElementsByTagName('div');
	if (hiddenBlocks == null) {
		n = activeBlock.indexOf("_",1);
		hiddenBlocks = activeBlock.substring(0,n);
	} else n = hiddenBlocks.length;

	for (var i=0; i<x.length; i++) {
		if (x[i].id.substring(0,n) == hiddenBlocks) {
			x[i].style.display = "block";
		}
	}
	document.getElementById(activeBlock).style.display = "none";
}

function raiseInnerLayer(activeBlock1) {
	var x = document.getElementsByTagName('div');
	for (var i=0;i<x.length;i++) {
		if (x[i].id.substring(0,6) == '_inner') {
			x[i].style.visibility = "hidden";
			x[i].style.zIndex = 0;
		}
	}
	document.getElementById(activeBlock1).style.visibility = "visible";
	document.getElementById(activeBlock1).style.zIndex = 1;
}

function raiseNav(activeBlock1) {
	var x = document.getElementsByTagName('div');
	for (var i=0;i<x.length;i++) {
		if (x[i].id.substring(0,4) == '_nav') {
			x[i].style.visibility = "hidden";
		}
	}
	document.getElementById(activeBlock1).style.visibility = "visible";
}