function OnClickBtnPreviewImage(FileUpload, ImagePreview)
{
    var fileUpload = document.getElementById(FileUpload);
    var imagePreview = document.getElementById(ImagePreview);
    var extArr = new String("jpg.jpeg.jpe.bmp.gif.png.tiff.tif.ief.cgm");
    if(fileUpload!=null && imagePreview!=null)
    {
        var fileName = fileUpload.value;
        if(fileName!="")
        {
            var ext = fileName.substring(fileName.lastIndexOf(".")+1, fileName.length);
            if(extArr.lastIndexOf(ext)!=-1)
            {
                imagePreview.innerHTML="<img src=\""+fileUpload.value+"\">";
            }
            else
            {
                imagePreview.innerHTML="";
            }
        }
        else
        {
            imagePreview.innerHTML="";
        }
    }
}

function OnChangeDdlOpenWindow(Dropdownlist)
{
    var Dropdown = document.getElementById(Dropdownlist);
    if(Dropdown.value!="")
        window.open(Dropdown.value);
}

function OnTextChange(TextBox)
{
    var textBox = document.getElementById(TextBox);
    window.open(textBox.value);
}