var currFeature = '1';

function switchTab(nextTabId)
{

	currentId = "position" + currFeature;
	nextId = "position" + nextTabId;

	document.getElementById("currentfeature").innerHTML = eval ("featureHTML" + nextTabId);

	document.getElementById(currentId).className ="inactive";
	document.getElementById(nextId).className ="active";

	currFeature = nextTabId;
}