var imgDir = "http://www.brooklynpubliclibrary.org/civilwar/images/CivilWar/";

function CWpreloadNav() {

    CWnav_on_img = new Array();
    CWnav_off_img = new Array();
    
	// CW main navigation
    CWnavNames = new Array ('soldiers','women','slavery','dailyLife');
    for (var i=0; i<CWnavNames.length; i++) {
        var a = CWnavNames[i];
        CWnav_on_img[a] = new Image(); 
        CWnav_on_img[a].src = imgDir + "btn_cat_" + a + "_on.jpg";
        
        CWnav_off_img[a] = new Image(); 
        CWnav_off_img[a].src = imgDir + "btn_cat_" + a + "_off.jpg";
        }       	
}

function CWpreloadFeat() {

    CWfeat_on_img = new Array();
    CWfeat_off_img = new Array();
    
	// CW main navigation
    CWfeatNames = new Array ('map','timeline');
    for (var i=0; i<CWfeatNames.length; i++) {
        var a = CWfeatNames[i];
        CWfeat_on_img[a] = new Image(); 
        CWfeat_on_img[a].src = imgDir + "btn_features_" + a + "_on.gif";
        
        CWfeat_off_img[a] = new Image(); 
        CWfeat_off_img[a].src = imgDir + "btn_features_" + a + "_off.gif";
        }       	
}

function CWpreloadTheme() {

    CWtheme_on_img = new Array();
    CWtheme_off_img = new Array();
    
	// CW main navigation
    CWthemeNames = new Array ('soldiers','women','slavery','dailyLife');
    for (var i=0; i<CWthemeNames.length; i++) {
        var a = CWthemeNames[i];
        CWtheme_on_img[a] = new Image(); CWtheme_on_img[a].src = imgDir + "btn_theme_" + a + "_on.gif";
        CWtheme_off_img[a] = new Image(); CWtheme_off_img[a].src = imgDir + "btn_theme_" + a + "_off.gif";
        }       	
}


function CWpreloadArrows() {

    CWarrow_on_img = new Array();
    CWarrow_off_img = new Array();
    
	// CW main navigation
    CWarrowNames = new Array ('prevArrow','nextArrow', 'prevArrowSm', 'nextArrowSm');
    for (var i=0; i<CWarrowNames.length; i++) {
        var a = CWarrowNames[i];
        CWarrow_on_img[a] = new Image(); CWarrow_on_img[a].src = imgDir + "btn_" + a + "_on.gif";
        CWarrow_off_img[a] = new Image(); CWarrow_off_img[a].src = imgDir + "btn_" + a + "_off.gif";
        }       	
}

function CWpreloadDocThumb() {

    CWdocThumb_on_img = new Array();
    CWdocThumb_off_img = new Array();
    
	// CW main navigation
    CWdocThumbNames = new Array ('times2','times4', 'pointer');
    for (var i=0; i<CWdocThumbNames.length; i++) {
        var a = CWdocThumbNames[i];
        CWdocThumb_on_img[a] = new Image(); CWdocThumb_on_img[a].src = imgDir + "btn_doc_" + a + "_on.gif";
        CWdocThumb_off_img[a] = new Image(); CWdocThumb_off_img[a].src = imgDir + "btn_doc_" + a + "_off.gif";
        }       	
}

function CWswapImg(imgFile, imgName) {
	document[imgName].src = imgDir + imgFile;
}

CWpreloadNav();


function emailit(whoto,domainto,title,subject,displayname)
{
	if (domainto == null || domainto == '') {domainto = 'brooklynpubliclibrary.org';}
	var writeit = whoto + '@' + domainto;
	if (displayname == null || displayname == '') {displayname = writeit;}
	
	if (subject == null || subject == '') {
		document.write("<a href='mailto:"+writeit+"' title='"+title+"'>"+displayname+"</a>");
	}
	else {
		document.write("<a href='mailto:"+writeit+"?subject="+subject+"' title='"+title+"'>"+displayname+"</a>");
	}
}