<!--

var firstday = 292;
var lastday = 298;

function highlightCurrentMRRDay(event) {
    var img = document.getElementById('mrrimg'); 
    var currday = img.src.replace(/^.*images\/USA5.2007(\d*).terra.2km.jpg/ ,"$1");
    document.getElementById("day" +currday).style.fontWeight='bold';
}

function swapMRRImage(event) {
    if ( typeof(event) != 'string' ) {
        if ( !event ) var event = window.event;
        var target = (event.target) ? event.target.id : event.srcElement.id; 
    } else {
        var target = event;
    }

    var newday = target.replace(/day/,'');

    if ( ! newday ) return;

    var img = document.getElementById('mrrimg'); 
    var currday = img.src.replace(/^.*images\/USA5.2007(\d*).terra.2km.jpg/ ,"$1");
    document.getElementById("day" +currday).style.fontWeight='normal';
    document.getElementById("day" +newday).style.fontWeight='bold';
    img.src = 'images/USA5.2007' + newday + '.terra.2km.jpg';

    //alert(img.src);
 }


function nextMRRImage(event) {
    var img = document.getElementById('mrrimg');
    var currday = img.src.replace(/^.*images\/USA5.2007(\d*).terra.2km.jpg/ ,"$1");
    var nextday = parseInt(currday)+1;
    if ( currday < lastday ) {
        document.getElementById("day" +currday).style.fontWeight='normal';
        document.getElementById("day" +nextday).style.fontWeight='bold';
        img.src = 'images/USA5.2007' + nextday + '.terra.2km.jpg';
    }
 }

function prevMRRImage(event) {
    var img = document.getElementById('mrrimg');
    var currday = img.src.replace(/^.*images\/USA5.2007(\d*).terra.2km.jpg/ ,"$1");
    var prevday = parseInt(currday)-1;
    if ( currday > firstday ) {
        img.src = 'images/USA5.2007' + prevday + '.terra.2km.jpg';
        document.getElementById("day" +currday).style.fontWeight='normal';
        document.getElementById("day" +prevday).style.fontWeight='bold';
    }
 }

//-->