How to use script to open a folder on desktop?

Hi, everyone

I want open a folder on desktop after gen PDF but error, can someone help me to fix it?

var f = new Folder(“~/Desktop/Revised_PDF put in here/”); 
f.create();

var doc = app.documents; 
app.findTextPreferences = null; 
app.findTextPreferences.underline = true; 
for(var i=0;i<doc.length;i++) 
{ 
        var found = doc[i].findText(); 
        var _pages = []; 
        for(var j=0;j<found.length;j++) 
        { 
                var txfms = found[j].texts[0].parentTextFrames; 
                for(var k=0;k<txfms.length;k++) 
                { 
                        _pages.push(txfms[k].parentPage.name); 
                    } 
            } 
        for(var j=0;j<_pages.length;j++) 
        { 
                if(_pages[j] === _pages[j-1]) 
                { 
                        _pages.splice(j,1); 
                    } 
            } 
        if(_pages.length != 0) 
        { 
                app.pdfExportPreferences.pageRange = _pages.toString(); 
                doc[i].exportFile(ExportFormat.PDF_TYPE, new File(“~/Desktop/Revised_PDF put in here/” + doc[i].name.replace(/\.indd$/i,”.pdf”)), false);
            } 
        _pages = []; 
    } 
app.findTextPreferences = null;

folder.open(“~/Desktop/Revised_PDF put in here/”)  // <-----------this line error

John