var navtimer;
killallnavs = function (){
	document.getElementById("dropdown_instruments").style.visibility = "hidden";
	document.getElementById("dropdown_artists").style.visibility = "hidden";
	document.getElementById("dropdown_media").style.visibility = "hidden";
	document.getElementById("dropdown_social").style.visibility = "hidden";
	document.getElementById("nav_instruments").style.backgroundPosition="0px 0px";
	document.getElementById("nav_artists").style.backgroundPosition="0px 0px";
	document.getElementById("nav_media").style.backgroundPosition="0px 0px";
	document.getElementById("nav_social").style.backgroundPosition="0px 0px";
}
drop_inst = function (){
	document.getElementById("dropdown_instruments").style.visibility = "visible";
	document.getElementById("dropdown_artists").style.visibility = "hidden";
	document.getElementById("dropdown_media").style.visibility = "hidden";
	document.getElementById("dropdown_social").style.visibility = "hidden";
	document.getElementById("nav_instruments").style.backgroundPosition="0px -66px";
	document.getElementById("nav_artists").style.backgroundPosition="0px 0px";
	document.getElementById("nav_media").style.backgroundPosition="0px 0px";
	document.getElementById("nav_social").style.backgroundPosition="0px 0px";
}
drop_art = function (){
	document.getElementById("dropdown_instruments").style.visibility = "hidden";
	document.getElementById("dropdown_artists").style.visibility = "visible";
	document.getElementById("dropdown_media").style.visibility = "hidden";
	document.getElementById("dropdown_social").style.visibility = "hidden";
	document.getElementById("nav_instruments").style.backgroundPosition="0px 0px";
	document.getElementById("nav_artists").style.backgroundPosition="0px -66px";
	document.getElementById("nav_media").style.backgroundPosition="0px 0px";
	document.getElementById("nav_social").style.backgroundPosition="0px 0px";
}
drop_med = function (){
	document.getElementById("dropdown_instruments").style.visibility = "hidden";
	document.getElementById("dropdown_artists").style.visibility = "hidden";
	document.getElementById("dropdown_media").style.visibility = "visible";
	document.getElementById("dropdown_social").style.visibility = "hidden";
	document.getElementById("nav_instruments").style.backgroundPosition="0px 0px";
	document.getElementById("nav_artists").style.backgroundPosition="0px 0px";
	document.getElementById("nav_media").style.backgroundPosition="0px -66px";
	document.getElementById("nav_social").style.backgroundPosition="0px 0px";
}
drop_soc = function (){
	document.getElementById("dropdown_instruments").style.visibility = "hidden";
	document.getElementById("dropdown_artists").style.visibility = "hidden";
	document.getElementById("dropdown_media").style.visibility = "hidden";
	document.getElementById("dropdown_social").style.visibility = "visible";
	document.getElementById("nav_instruments").style.backgroundPosition="0px 0px";
	document.getElementById("nav_artists").style.backgroundPosition="0px 0px";
	document.getElementById("nav_media").style.backgroundPosition="0px 0px";
	document.getElementById("nav_social").style.backgroundPosition="0px -66px";
}