///////////////////////////////////////////////////////////////////////////
// Image rollover functions

function makeArray() { // JS1.0-compatible
	var args = makeArray.arguments;
    	for (var i = 0; i < args.length; i++) {	this[i] = args[i]; }
	this.length = args.length;
}
var imageNames = new makeArray(
		"nav_portfolio","nav_news","nav_whois","nav_sales","nav_friends","nav_guestbook"
		);

var imagePrefix = "images/";
var imageOnSuffix = "_on.gif";
var imageOffSuffix = "_off.gif";

// preload gifs
if (document.images) {
	var i;
	var imagesOn = new Array();
	for ( i=0 ; i<imageNames.length ; i++ ) {
		imagesOn[i] = new Image();
		imagesOn[i].src = (imagePrefix + imageNames[i] + imageOnSuffix);
		
	}
}
// rollover functions
function img_act(target) {
	if (document.images) {
		if (document.all) {
			document[target].src = (imagePrefix + target + imageOnSuffix);
		}
		else {
			document.images[target].src = (imagePrefix + target + imageOnSuffix);
		}
	}
}
function img_inact(target) {
	if (document.images) {
		if (document.all) {
			document[target].src = (imagePrefix + target + imageOffSuffix);
		}
		else {
			document.images[target].src = (imagePrefix + target + imageOffSuffix);
		}
	}
}

//popup window + center + focus
var tobWin = null;
function pop_Wind(mypage,myname,w,h,scroll,status,resize){
	LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
	TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
	settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable='+resize+',status='+status;

		if(!tobWin || tobWin.closed){
			tobWin = window.open(mypage,myname,settings);
		}//end if
		else{
			tobWin.location = mypage;	
			tobWin.focus();
//			alert(settings);
		}//end else
}//end popup function


//Browser detection
ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false