var cLink = app.selection[0].graphics.item(0).itemLink; 
var newFile = File(cLink.filePath); 
var newFileName = "test2.png"; 
 
newFile.rename(newFileName); 
 
try { 
    cLink.relink(newFile); 
} catch (e) { alert(e); } 

var allPaths = app.documents[0].links.everyItem().filePath; 
var allLinks = app.documents[0].links; 
 
var onePath  = app.selection[0].graphics.item(0).itemLink.filePath; 
var cLink    = app.selection[0].graphics.item(0).itemLink; 
 
var newFile = File(cLink.filePath); 
var newFileName = "test2.png"; 
newFile.rename(newFileName); 
 
for (var n=0; n<allPaths.length; n++) { 
	if (allPaths[n] == onePath) { 
		try { 
			allLinks[n].relink(newFile); 
		} 
		catch (e) { 
			alert(e); 
		} 
	} 
} 

//RenameRelink.jsx 
//Olav Kvern 
//An InDesign CS2 JavaScript 
// 
//Renames the file of the selected linked graphic and relinks to the renamed graphic. 
//Used in the production of "Real World Adobe InDesign CS2" 
// 
 
var myDoc = app.activeDocument; 
var myMultipleLinks = new Array(); 
 
if(app.documents.length != 0){ 
    if((app.documents.item(0).allGraphics.length != 0)&&(app.selection.length != 0)){ 
        //A production version of this script would probably include 
        //a more complete list of graphic/page item types. 
        switch(app.selection[0].constructor.name){ 
            //If a frame is selected with the Selection tool... 
            case "Rectangle": 
            case "Oval": 
            case "Polygon": 
                if(app.selection[0].graphics.length != 0) { 
                    var selImage = app.selection[0].graphics.item(0); 
                } 
                break; 
            //If a graphic is selected with the Direct Selection tool... 
            case "Image": 
            case "EPS": 
            case "PDF": 
                var selImage = app.selection[0]; 
                break; 
        } 
        if (selImage != undefined) { 
            switch (selImage.itemLink.status) { 
                case LinkStatus.linkMissing :  
                    alert("Can't rename missing link."); 
                    break; 
                case LinkStatus.LINK_EMBEDDED : 
                    alert("Can't rename embedded link."); 
                    break; 
                default: myDisplayDialog(selImage); 
             } 
        } 
    } 
} 
 
function myDisplayDialog(myGraphic){ 
 var myLink = myGraphic.itemLink; 
 var myLinkName = myLink.name; 
 
 var myDialog = app.dialogs.add({name:"Rename placed file"}); 
 with(myDialog.dialogColumns.add()){ 
  with(dialogRows.add()){ 
   with(dialogColumns.add()){ 
    staticTexts.add({staticLabel:"File name:"}); 
   } 
   with(dialogColumns.add()){ 
    var myFileNameField = textEditboxes.add({editContents:myLinkName, minWidth:200}); 
   } 
  } 
 } 
 var myResult = myDialog.show(); 
 if(myResult == true){ 
  var myFileName = myFileNameField.editContents; 
  myDialog.destroy(); 
  myRenameGraphic(myLink, myFileName); 
 } 
 else{ 
  myDialog.destroy(); 
 } 
} 
 
// Relink the links placed more than once 
function myRenameGraphic(myLink, myNewLinkName) { 
    var myExtension = myLink.name.substr(myLink.name.lastIndexOf( "." )); 
     
	var myMultiUsedLink = new Array(); 
	var myAllLinks = myDoc.links; 
	 
	for (var d = 0; d < myAllLinks.length; d++)  { 
		if (myAllLinks[d].filePath == myLink.filePath) { 
			myMultiUsedLink.push(myAllLinks[d]); 
		} 
	} 
 
    if (myNewLinkName != myLink.name) { // (myNewLinkName + myExtension != myLink.name) 
        var myOldImageHDfile = new File( myLink.filePath ); 
        var myOldLinkNameStr = String(myLink.name); 
        var myRenameResult = myOldImageHDfile.rename(myNewLinkName); //( myNewLinkName + myExtension ) 
        if (myRenameResult) { 
            myLink.relink(myOldImageHDfile); 
             
            for (var f = myMultiUsedLink.length-1; f >= 0 ; f--) { 
                var myCurrLink = myMultiUsedLink[f]; 
                if (myNewLinkName != myCurrLink.name) { //(myNewLinkName + myExtension != myCurrLink.name) 
                    myCurrLink.relink(myOldImageHDfile); 
                } 
            } 
        } 
        else { 
            if (new File(myOldImageHDfile.parent + "/" + myNewLinkName).exists) { //(myOldImageHDfile.parent + "/" + myNewLinkName + myExtension) 
                alert("CAN'T RENAME LINK -- " + myOldImageHDfile.name + " to " + myNewLinkName + " because the file already exists\n"); 
                //("CAN'T RENAME LINK -- " + myOldImageHDfile.name + " to " + myNewLinkName + myExtension + " because the file already exists\n") 
            } 
            else { 
                alert("CAN'T RENAME LINK -- " + myOldImageHDfile.name + "\n"); 
            } 
        } 
    } 
	// UpdateAllOutdatedLinks(); 
}