// Hide instruction text for password field
function txt2pwd(obj, pwd){
	obj.style.visibility = "hidden";
	document.getElementById(pwd).focus();
}

// Display instruction text for password field
function pwd2txt(obj, txt){
	if(obj.value.length==0){
		document.getElementById(txt).style.visibility = "visible";
	}
}

// Display instruction text [str] if field is blank
// Clear instruction text if field is clicked
function resetField(obj,str){
	if(obj.value.length==0){
		obj.value=str;
		return;
	}
	if(obj.value==str){
		obj.value="";
	}
}

// Tab switcher
// container = ID of tab container, must be used if more than one tab module is used on page (optional usage if only one tab module is displayed on a page )
// tab = ID of tab (mandatory)
function showTab(tab, container){
	if(typeof(container)=='undefined') {
		container='';
	}
	var i=1;
	do{
		document.getElementById(container+"tab"+i).className = "tab";
		document.getElementById(container+"tab"+i+"content").style.display="none";
		i++;
	}
	while(document.getElementById(container+"tab"+i));
	document.getElementById(container+tab+"content").style.display="block";
	document.getElementById(container+tab).className = "activeTab";
}


// Flash detection for Call-to-action teaser
function hasFlash(){
  var ver=6;
	if(navigator.appVersion.indexOf("MSIE")!=-1&&navigator.appVersion.indexOf("Windows")>-1) {
	  document.write('<script language="VBScript"\> \non error resume next \nhasFlash = (IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash." & '+ver+'))) \n</script\> \n');
		if(window.hasFlash!=null)
		  return window.hasFlash
	}
	if(navigator.mimeTypes&&navigator.mimeTypes["application/x-shockwave-flash"]&&navigator.mimeTypes["application/x-shockwave-flash"].enabledPlugin) {
	  var desc=(navigator.plugins["Shockwave Flash 2.0"]||navigator.plugins["Shockwave Flash"]).description;
		return parseInt(desc.charAt(desc.indexOf(".")-1))>=ver;
	}
	return false;
} // hasFlash


// replace the HTML Call-to-action box by a flash movie using the Vodafone corporate font
function replaceCTABox(){
	if (hasFlash()) {
		//get data from html-box
		var cta = document.getElementById('ctaLayer');
		var ctaMod = cta.parentNode;
		if (ctaMod!=null && cta!=null) {
			var h1,s,a,l,u,t; h1=s=a=l=u=t='';
			if (cta.getElementsByTagName("h1")[0]!=null) h1= encodeURI(cta.getElementsByTagName("h1")[0].innerHTML);
			if (cta.getElementsByTagName("p")[0]!=null) s = encodeURI(cta.getElementsByTagName("p")[0].innerHTML);
			var w = cta.offsetWidth;
        var h = cta.offsetHeight;
			var flashVars = "head="+h1+"&sub="+s+"&boxw="+w+"&boxh="+h;
			var a = cta.getElementsByTagName("a")[0];
			if (a!=null) {
		    	var l = encodeURI(a.innerHTML);
		    	var u = encodeURI(a["href"]);
		    	var t = a["target"];
          flashVars+="&link="+l+"&url="+u+"&target="+t;
			}
			// hide html-box
			cta.className="ctaLayer hide";
			// and place flash cta box
			var flashURL = "/swf/calltoactionbox.swf?"+flashVars;
			var ctaObjStr = "<object class='ctaLayer' type='application/x-shockwave-flash' data='"+flashURL+"' width='"+w+"' height='"+h+"' id='calltoactionbox'>"
			                +   "<param name='allowScriptAccess' value='sameDomain' />"
									    +   "<param name='movie' value='"+flashURL+"' />"
									    +   "<param name='quality' value='high' />"
									    + "</object>";
		  document.write(ctaObjStr);
		}
	}
} // replaceCTABox


// fold and unfold option sections on shopping cart page
function scFold(optId) {
  var optHeader = document.getElementById(optId);
	if (optHeader!=null) {
		var pattern = new RegExp("(^|\\s)"+optId+"(\\s|$)");
		var trList = document.getElementsByTagName('tr');
	  if (optHeader.className=="scOptShow") {
		  // hide options
			for (i=0; i<trList.length; i++) {
			  if (pattern.test(trList[i].className)) {
				  trList[i].className=optId+" hidden";
				}
			}
      optHeader.className="scOptHide";			
		} else {
		  // show options
			for (i=0; i<trList.length; i++) {
			  if (pattern.test(trList[i].className)) {
				  trList[i].className=optId;
				}
			}			
      optHeader.className="scOptShow";			
		}
	}
} // scFold