if(document.images !=null){preload()}

function preload() {
	nab01 = new Image();
	nab01.src = "images/work_design1.jpg";
	nab02 = new Image();
	nab02.src = "images/work_design2.jpg";
	nab03 = new Image();
	nab03.src = "images/work_design3.jpg";
	nab04 = new Image();
	nab04.src = "images/work_design4.jpg";
	nab05 = new Image();
	nab05.src = "images/work_design5.jpg";
	nab06 = new Image();
	nab06.src = "images/work_design6.jpg";
	nab07 = new Image();
	nab07.src = "images/work_design7.jpg";
	nab08 = new Image();
	nab08.src = "images/work_design8.jpg";
	nab09 = new Image();
	nab09.src = "images/work_design9.jpg";
	nab10 = new Image();
	nab10.src = "images/work_design10.jpg";
	nab11 = new Image();
	nab11.src = "images/work_design11.jpg";
	nab12 = new Image();
	nab12.src = "images/work_design12.jpg";
	nab15 = new Image();
	nab15.src = "images/marker_blank.gif";
	nab13 = new Image();
	nab13.src = "images/marker_gold.gif";
	nab14 = new Image();
	nab14.src = "images/marker_maroon.gif";	
	
}

function switchImages(title, title_name){
	if(document.images != null){
		title = eval(title + ".src");
		document[title_name].src = title;
	}
}

// Switch title_name to newImg if it currently contains oldImg
function conditionalSwitch(newImg, oldImg, title_name)
{
	if (document.images != null) {
		var newImgTitle = eval(newImg + ".src");
		var oldImgTitle = eval(oldImg + ".src");
		if (document[title_name].src == oldImgTitle)
			document[title_name].src = newImgTitle;
	}
}

var previousMarker = 'marker1';

function highlightSelection(bigImg, marker) 
{
	if (document.images != null) {
		var bigImgTitle = eval(bigImg + ".src");
		document['big'].src = bigImgTitle;
		document[previousMarker].src = nab15.src;	// blank previously marked spot
		document[marker].src = nab14.src;			// mark new selection
		previousMarker = marker;
	}
}

function switchImages2(title, title_name){
	switchImages(title, title_name);
}