function style_display(which, setting) {
	var ths= document.getElementById(which);
	if (ths)
		ths.style.display=setting;
	return true;
}

var boxhover = new Array();

function boxhover_over(box,div) {
	var ths= boxhover[box];
	if (ths) {
		div_last= ths.div_last;
		if (div_last) {
			style_display(box+'_'+div_last, "none")
			ths= document.getElementById(box+'_tab_'+div_last);
			if (ths)
				ths.className="Nav_tab_li_unselected ztab"+div_last;
		}
		style_display(box+'_'+div, "");
		ths= document.getElementById(box+'_tab_'+div);
		if (ths)
			ths.className="Nav_tab_li_selected";
		boxhover[box].div_last= div;
	}
	return true;
}

function boxhover_init(box, num)
{
	var y;
	var ths;
	boxhover[box]= new Object();
	boxhover[box].div_max= num;
	for (y=1;y<=num;y++){
		style_display(box+'_'+y, "none")
		ths= document.getElementById(box+'_tab_'+y);
		if (ths) {
			ths.className="Nav_tab_li_unselected ztab"+y;
		}
	}
}
function Nav_click(ths)
{
	ths.blur();
	return true;
}