// JavaScript Document

//MUST BE LOADED IN THE END OF THE HTML PAGE

var isNS4	= (document.layers) ? true : false;
var isIE4	= (document.all && !document.getElementById) ? true : false;
var isIE5	= (document.all && document.getElementById) ? true : false;
var isNS6	= (!document.all && document.getElementById) ? true : false;

var hover_trg_left=getElement("left");
var hover_img_left=getElement("bar_left");
var hover_trg_right=getElement("right");
var hover_img_right=getElement("bar_right");

/* define the mouse over functions for the nav bar ends */

hover_trg_left.onmouseover=function(){

	hover_img_left.src="images/bar_left_on.gif";
}
hover_trg_left.onmouseout=function(){

	if (left_bar_default_on)
		hover_img_left.src="images/bar_left_on.gif";
	else
		hover_img_left.src="images/bar_left.gif";
}

hover_trg_right.onmouseover=function(){

	hover_img_right.src="images/bar_right_on.gif";
}
hover_trg_right.onmouseout=function(){

	if (right_bar_default_on)
		hover_img_right.src="images/bar_right_on.gif";
	else
		hover_img_right.src="images/bar_right.gif";
}


function getElement(id) {
	//return a reference to an element (div, image, form, etc) given is id
	var elem;
	if (id == "") { return null; }
	if (isNS4) {												   // NS4 is not supported
	} 
	else if (isNS6) {											   // Netscape 6 +
		elem = document.getElementById(id);
	} 
	else {													   // IE and everything else
		elem = document.all[id];
	}

	return elem;
}