function toggleLinkType(link_type)
{

	if(link_type=="webHome")
	{
		document.getElementById("tr_link_text").style.display="";
		document.getElementById("tr_link_url").style.display="none";
		document.getElementById("tr_promotion_doc").style.display="none";	
	}
	else if(link_type=="webOther")
	{
		document.getElementById("txt_linkItem").value="";
		document.getElementById("tr_link_text").style.display="";
		document.getElementById("tr_link_url").style.display="";
		document.getElementById("tr_promotion_doc").style.display="none";	
	}
	else if(link_type=="promoFile")
	{
		document.getElementById("tr_link_text").style.display="";
		document.getElementById("tr_link_url").style.display="none";
		document.getElementById("tr_promotion_doc").style.display="";	
	}
	else
	{
		document.getElementById("tr_link_text").style.display="none";
		document.getElementById("tr_link_url").style.display="none";
		document.getElementById("tr_promotion_doc").style.display="none";	
	}
}