function checkpdf (link){ 
var found = false; 
var info = ''; 
try  
{     
    acrobat4 = new ActiveXObject('PDF.PdfCtrl.1');     
    if (acrobat4)  
    {       
        found = true;       
        info = 'v. 4.0';     
    }   
}   
catch (e)  
{ 
    //??? 
} 
 
if (!found) 
{ 
    try  
    { 
        acrobat7 = new ActiveXObject('AcroPDF.PDF.1'); 
        if (acrobat7)  
        { 
                found = true; 
                info = 'v. 7+'; 
        } 
    }  
    catch (e)  
    { 
        //??? 
    } 
 
    if (!found && navigator.plugins && navigator.plugins.length>0) 
    { 
        for (var i = 0; i<navigator.plugins.length; i++)  
        {                                                
                if (navigator.plugins[i].name.indexOf('Adobe Acrobat') > -1) 
                { 
                        found = true;  
                        info = navigator.plugins[i].description + ' (' + navigator.plugins[i].filename + ')'; 
                        break; 
                } 
        } 
    } 
}

if (!found){
	link = 'http://get.adobe.com/reader/';
}
window.open(link, 'PDF');
 
}