function showElement(strElementID) 
{
	objElement = document.getElementById(strElementID);
	if (objElement != null) {	
		objElement.style.visibility = "visible";
		objElement.style.display = "block";
	}
}

function hideElement(strElementID) 
{
	objElement = document.getElementById(strElementID);
	
	if (objElement != null) {	
		objElement.style.visibility = "hidden";
		objElement.style.display = "none";
	}
}

function showTab(strElementID)
{
	//hide all
	hideAllTabs();

	// show 1
	showElement(strElementID) 
	
	// change tab state
	setClassName(strElementID + "-tab", "active")
}


function hideAllTabs(strElementID)
{
	//reset content
	hideElement("derecha");
	hideElement("derecha2");
	hideElement("derecha3");
	hideElement("derecha4");
	hideElement("derecha5");
	
	//reset state
	setClassName("overview-tab", "")
	setClassName("fullspecs-tab", "")
	setClassName("geometry-tab", "")
	setClassName("video-tab", "")
	setClassName("press-tab", "")
}


function setClassName(strElementID, strClassName)
{
	objElement = document.getElementById(strElementID)
	if (objElement != null) {
		objElement.className = strClassName;
	}
}