var lastImageChange;
var imageSwapImageDir = 'uploads/images/news/';
function changeMainImage(imgNumber){   
    var arrThumbs = strThumbs.split(";");
    var arrLarge = strLarge.split(";");

    //alert(imgNumber);
    if (lastImageChange == imgNumber) {
        imgNumber = 0
    }

    // change large image 
    var imgObj = document.getElementById('productLargePic');
    imgObj.src = imageSwapImageDir + arrLarge[imgNumber];

    // reset thumbnails 
    imgObj = document.getElementById('productThumbPic0');
    if (imgObj != null) {
        imgObj.src = imageSwapImageDir + arrThumbs[0];
    }
    imgObj = document.getElementById('productThumbPic1');
    if(imgObj!=null){
        imgObj.src = imageSwapImageDir + arrThumbs[1];
    }
    imgObj = document.getElementById('productThumbPic2');
    if (imgObj != null) {
        imgObj.src = imageSwapImageDir + arrThumbs[2];
    }
    imgObj = document.getElementById('productThumbPic3');
    if (imgObj != null) {
        imgObj.src = imageSwapImageDir + arrThumbs[3];
    }        

    // change thumbnail
    //if (imgNumber > -1) {
    //    imgObj = document.getElementById('productThumbPic' + imgNumber);
    //    imgObj.src = imageSwapImageDir + arrThumbs[0];
    //}

    lastImageChange = imgNumber
}