function ChangeProductImage(x)
{
    var strName = x;
    var strColourName;
    strColourName = strName.substring(0,strName.toString().indexOf("_"));    
    var hidId = document.getElementById('ctl00_WebsiteContent_hidId');
    var hidMainColour = document.getElementById('ctl00_WebsiteContent_hidMainColour');
    var src;
    var href;

    if(document.getElementById('zoom').innerHTML.indexOf(strColourName) == -1){
        MagicZoom_stopZooms();
        if(strName.toString().indexOf(hidMainColour.value) > -1)
        {
           src =  '/productimages/main/' + hidId.value + '_' + '1_Detail.jpg';
        }
        else
        {
            src = '/productimages/colourways/' + hidId.value + '_' + strColourName + '_' + '1_Detail.jpg';
        }
        href = src.replace('Detail','Zoom');      
        document.getElementById('zoom').innerHTML = '<a id="ctl00_WebsiteContent_lnkZoom" class="MagicZoom" rel="zoom-width:440px;zoom-height:420px;" onclick="return false;" href="' + href + '"><img id="ctl00_WebsiteContent_imgZoom" name="imgZoom" src="' + src + '" alt="" style="border-width:0px;" /></a>';
        setTimeout('MagicZoom_findZooms()', 100);
    }
}