function Print()
{
	var obj1 = document.getElementById("BtnPrint")
	var obj2 = document.getElementById("BtnBack")
	
	obj1.style.visibility = 'hidden'
	obj2.style.visibility = 'hidden'
	
	window.print()
	
	obj1.style.visibility = 'visible'
	obj2.style.visibility = 'visible'
}