function hide_slct() 
{

	var slct = document.getElementsByTagName('select')
	if(navigator.appName == "Microsoft Internet Explorer")
	{
		for (i=0;i<slct.length; i++) 
			{
			slct.item(i).style.visibility="hidden";
			}
	}
}

function show_slct() 
{
	var slct = document.getElementsByTagName('select')
	if(navigator.appName == "Microsoft Internet Explorer")
	{
	for (i=0;i<slct.length; i++) 
		{
		slct.item(i).style.visibility="visible";
		}
	}
}