function ltrim(str)
{
  return str.replace(/^\s+/, '');
}
function rtrim(str) 
{
    return str.replace(/\s+$/, '');
}
function alltrim(str) 
{
    return str.replace(/^\s+|\s+$/g, '');
}


function GetElement(elementName)
{

    return document.getElementById(elementName);

}

function GetIFrame()
{
    return GetElement("iframePreview");

}


function checkforValidFileExtension(fld)
{



   var RegExPattern = /^.*\.(aspx)$/i;
    if ((fld.match(RegExPattern)) && (fld!='')) 
    {
        return true;
    } 
    else 
    {
       return false;
    } 
}

function alertMessage(str)
{

alert(str);

}