function hide() {
	myreg = /[\w-]+\.html$/
	var h = myreg.exec(location.pathname)+""
	h = h.replace(".html","")
	switch (h) {
		case "instrument":
			document.getElementById("instrument").style.display = "none"
			break			
		case "calc":
			document.getElementById("calc").style.display = "none"
			break
		case "express-order":
			document.getElementById("express-order").style.display = "none"
			break
		case "demo-order":
			document.getElementById("demo-order").style.display = "none"
		default: 
			break
	}
}