var pdfImage = "http://www.osg.com/images/icons/dl-pdf.gif";
 var excelImage = "http://www.osg.com/images/icons/dl-excel.gif";
 var wordImage = "http://www.osg.com/images/icons/dl-word.gif";
 var excelOffImage = "http://www.osg.com/images/icons/dl-exceloff.gif";
 var wordOffImage = "http://www.osg.com/images/icons/dl-wordoff.gif";
 var wmaImage = "http://www.osg.com/images/icons/dl-vid.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 "md_doc.gif":
			docImages[i].src=wordImage;
			break;

		case "word.gif":
			docImages[i].src=wordImage;
			break;
			
		case "word_off.gif":
			docImages[i].src=wordOffImage;
			break;
                
                case "md_xls.gif":
			docImages[i].src=excelImage;
			break;		

	        case "excel.gif":
			docImages[i].src=excelImage;
			break;
		case "excel_off.gif":
			docImages[i].src=excelOffImage;
			break;

                case "md_win.gif":
                        docImages[i].src=wmaImage;
			break;

                 case "WinMedia_sm.gif":
                        docImages[i].src=wmaImage;
			break; 

	 	}
	 }
	
 
 }