function swapImage(image_id)
{
var objImg		= document.getElementById(image_id);
var objImgPre = document.getElementById(image_id+'_pre');
	if(objImg && objImgPre)
	{
		var strTempSource = objImg.src;
		objImg.src = objImgPre.src;
		objImgPre.src = strTempSource;
	}
}

function changeLanguage(sLan)
{
	var sUrl = document.location.href;
	if(sUrl.indexOf('numlanguageid') !== -1)
	{
		var iStart = sUrl.indexOf('numlanguageid');
		sUrl = sUrl.substr(0,iStart-1);
	}
	if(sUrl.indexOf('?') !== -1)
	{
		sUrl = sUrl + "&numlanguageid=" + sLan;
	}
	else
	{
		sUrl = sUrl + "?numlanguageid=" + sLan;
	}
	document.location.href = sUrl;
}