// JavaScript Document


var isDHTML=0;
var isLayers=0;
var isAll=0;
var isID=0;

if (document.getElementById) {isID = 1; isDHTML = 1;}
else {
if (document.all) {isAll = 1; isDHTML = 1;}
else {
browserVersion = parseInt(navigator.appVersion);
if ((navigator.appName.indexOf('Netscape') != -1) && (browserVersion == 4)) {isLayers = 1; isDHTML = 1;}
}}


function findDOM(objectID,withStyle) {
	if (withStyle == 1) {
		if (isID) { return (document.getElementById(objectID).style) ; }
		else { 
			if (isAll) { return (document.all[objectID].style); }
		else {
			if (isLayers) { return (document.layers[objectID]); }
		};}
	}
	else {
		if (isID) { return (document.getElementById(objectID)) ; }
		else { 
			if (isAll) { return (document.all[objectID]); }
		else {
			if (isLayers) { return (document.layers[objectID]); }
		};}
	}
}

function nav_cell_change(element,over) {
// switch color of table cells
domStyle=findDOM(element,1);
if (over==1) domStyle.background='#ffffff';
else domStyle.background='#cacaca';

}


function first_nav_cell_change(element,over) {
// change color of one cell as soon as page loads to overcome browser bug


if ((navigator.appName.indexOf('Netscape') == -1)) {
element='nav_link1';
domStyle=findDOM(element,1);
domStyle.background='#cacaca';
}


}