function switchProductTab(tabId) {
	
	var tabIds = new Array("general","features","pdf","demo");
	
	var productTabs = new Array();
	productTabs['general'] = "productTabGeneral";
	productTabs['features'] = "productTabFeatures";
	productTabs['pdf'] = "productTabPDF";
	productTabs['demo'] = "productTabDemo";
	
	var productDivs = new Array();
	productDivs['general'] = "productDivGeneral";
	productDivs['features'] = "productDivFeatures";
	productDivs['pdf'] = "productDivPDF";
	productDivs['demo'] = "productDivDemo";

	for(i=0;i<tabIds.length;i++) {
		if (document.getElementById(productTabs[tabIds[i]])) {
			document.getElementById(productTabs[tabIds[i]]).className = "productTab";
			document.getElementById(productDivs[tabIds[i]]).style.display = "none";
		}
	}

	document.getElementById(productTabs[tabId]).className = "productTabSelected";
	document.getElementById(productDivs[tabId]).style.display = "block";

}