var lastImageChange;
var imageSwapImageDir = 'uploads/images/products/';
function changeMainImage(Number){   
    var arrThumbs = strThumbs.split(";");
    var arrNormal = strNormal.split(";");
    var arrLarge = strLarge.split(";");

    if(lastImageChange==Number){
        Number = 0
    }

    // change normal image 
    var imgObj = document.getElementById('productLargePic');
    imgObj.src = imageSwapImageDir + arrNormal[Number];

    // change large image
    var largeLink = document.getElementById('productLargeLink');
    if (arrLarge[Number] != 'na') {
        largeLink.href = imageSwapImageDir + arrLarge[Number];
    } else {
        largeLink.href = "";
    }

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

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