// show/hide Tabs using CSS
function showTab(tabNum){
	if(document.getElementById) { // Browser supports CSS tricks
		var tabCount = 4;
		for(i=1;i<=tabCount;i++) {
			myElement = 'tab'+i; // show/hide page tab content
			if(i == tabNum) { // selected tab
				myDisplay = "block";
			} else {
				myDisplay = "none";			
			}
			document.getElementById(myElement).style.display = myDisplay;
			myElement = 'toptab'+i; // change style on nav tabs
			if(i == tabNum) { // selected tab
				myClass = "current";
			} else {
				myClass = "inactive";		
			}
			document.getElementById(myElement).className = myClass;
		}
		return false;
	} else { // not gonna work, use HREF link instead
		return true;
	}
}