var imageCount = 13;

var btnNames = new Array (28);

btnNames[0] = 'Intro';
btnNames[1] = 'News';
btnNames[2] = 'FAQ';
btnNames[3] = 'Lic';
btnNames[4] = 'Rel';
btnNames[5] = 'Doc';
btnNames[6] = 'Present';
btnNames[7] = 'Team';
btnNames[8] = 'Collabor';
btnNames[9] = 'Email';
btnNames[10] = 'Contact';
btnNames[11] = 'Int';
btnNames[12] = 'Links';
btnNames[13] = 'Cust2';
btnNames[14] = 'Cust3';

var btnImagesOff = new Array (imageCount);
var btnImagesOn =  new Array (imageCount);
var btnName = new String;


function init()
{
	var index = 0;
	var btnName = new String;
	var w;
	var h;
	
	// alert("Goes into init");
	while(index < imageCount)
	{
		// alert("Object " + index);
		try {
			w = document.images[btnNames[index]].width;
			h = document.images[btnNames[index]].height
			btnImagesOff[index] = new Image(w, h);
			btnImagesOff[index].src = document.images[btnNames[index]].src;
			btnImagesOn[index] = new Image (w, h);
			btnName = document.images[btnNames[index]].src;
			btnName = btnName.substr(0,btnName.length - 4) + "_Over" + btnName.substr(btnName.length - 4, 4);
			btnImagesOn[index].src = btnName;
		}
		catch (Exception) {
			// alert(btnName + ' Not found');
		}
		index++;
		// alert(btnName);
	}
}

function on (picName)
{
	// find index
	var picNo = 0;
	while(picNo < imageCount)
	{
		if(btnNames[picNo] == picName)
			break;
		picNo++;		
	}
	
	if(picNo == imageCount)
		return;
		
	//alert("On " + btnNames[picNo] + " and " + btnImagesOn[picNo]);
	if(document.images)
	{
		document.images[btnNames[picNo]].src = btnImagesOn[picNo].src;
		window.status = btnNames[picNo];
	}
}

function off (picName)
{
	// find index
	var picNo = 0;
	while(picNo < imageCount)
	{
		if(btnNames[picNo] == picName)
			break;
		picNo++;		
	}
	
	if(picNo == imageCount)
		return;

	if(document.images)
	{
		document.images[btnNames[picNo]].src = btnImagesOff[picNo].src;
	}
}