function show(elmnt) {
	document.getElementById(elmnt).style.visibility="visible"
}
function hide(elmnt) {
	document.getElementById(elmnt).style.visibility="hidden"
}
	

function show_login(){
	login_box.style.visibility="visible";
}
	
function hide_login(){
	login_box.style.visibility="hidden";
}	

function show_login_hover(){
	myiiita_btn.style.background="url(images/myiiita_btn_over.gif) no-repeat";
}
	
function hide_login_hover(){
	myiiita_btn.style.background="url(images/myiiita_btn.gif) no-repeat";
}