function dropdown(id)
{
	i=0;
	while (document.getElementById("dropdown"+i))
	{
		document.getElementById("dropdown"+i).style.display='none';
		i++;
	}
	document.getElementById("dropdown"+id).style.display='block';

    var Activity=document.getElementById("ctl00_PageContent_ddlActivity")
	var uncertainity= document.getElementById("ctl00_PageContent_DdlUncertainity")
	var Searchby= document.getElementById("ctl00$PageContent$ddlSearchBy")
	var Sortby= document.getElementById("ctl00$PageContent$ddlSortBy")

	if(Activity!=null)
	{
		document.getElementById("ctl00_PageContent_ddlActivity").style.visibility = 'hidden';
	}	
	if(uncertainity!=null)
	{
		uncertainity.style.visibility = 'hidden';
	}	
	if(Searchby!=null)
	{
		Searchby.style.visibility = 'hidden';
	}	
    if(Sortby!=null)
	{
		Sortby.style.visibility = 'hidden';
	}	
}
function showhide(id)
{
	document.getElementById("dropdown"+id).style.display='none';
	var Activity=document.getElementById("ctl00_PageContent_ddlActivity")
	var uncertainity= document.getElementById("ctl00_PageContent_DdlUncertainity")
	var Searchby= document.getElementById("ctl00$PageContent$ddlSearchBy")
	var Sortby= document.getElementById("ctl00$PageContent$ddlSortBy")

	if(Activity!=null)
	{
		document.getElementById("ctl00_PageContent_ddlActivity").style.visibility = 'visible';
	}	
	if(uncertainity!=null)
	{
		uncertainity.style.visibility = 'visible';
	}
	if(Searchby!=null)
	{
		Searchby.style.visibility = 'visible';
	}	

	if(Sortby!=null)
	{
		Sortby.style.visibility = 'visible';
	}	
}