var pdfImage = "http://media.corporate-ir.net/media_files/irol/19/193857/images/pdf_icon.gif";

 var wordImage = "http://media.corporate-ir.net/media_files/irol/19/193857/images/icon_doc.gif";

 

 function swapImages()
 {
 	
 	var docImages = document.getElementsByTagName("img");
     
	 
	 for(var i = 0; i < docImages.length; i++)
	 {
	 	
		var tempImage = docImages[i].src;
		var imageName = tempImage.substr(tempImage.lastIndexOf("/") + 1);
		
		switch(imageName)
		{
		
		case "pdf.gif":
			docImages[i].src=pdfImage;
			break;

                case "md_pdf.gif":
			docImages[i].src=pdfImage;
			break;
		
		case "word.gif":
			docImages[i].src=wordImage;
			break;
                
   	 	}
	 }
	
 
 }