var active_item;
function show_menu ( link_id, submenu_id ) {
	var link = document.getElementById( link_id );
	var submenu = document.getElementById( submenu_id );
		
	if ( submenu ) {
		submenu.style.display='block';
		link.className='link_1 ov';
	}
}
function hide_menu ( link_id, submenu_id ) {
	var link = document.getElementById( link_id );
	var submenu = document.getElementById( submenu_id );
	
	if ( submenu ) {
		submenu.style.display='none';
		if ( link_id != active_item ) {
			link.className='link_1';
		}
	}
}
function hide_btn_top() {
	var objProduct = document.getElementById( 'txt_height' );
	var objScroll = document.getElementById( 'scroll' );
	var objTop = document.getElementById( 'btn_top' );
	
	if ( objProduct && objScroll && objTop ) {
		if ( objScroll.offsetHeight > objProduct.offsetHeight ) {
			objTop.style.display = 'block';
		} else {
			objTop.style.display = 'none';
		}
	}
	
}
function checkLen(x,y) {

	if (y.length==x.maxLength) {
		var next=x.tabIndex
		
		if (next<document.getElementById("age_form").length) {
			document.getElementById("age_form").elements[next].focus()
		}
	}
	
}