// JavaScript Document
 var utilport = new function() {

 var selectedLinkNum = 1;


	
       this.openPhotoLink = function(num) {
               var img = document.getElementById("portfolio_Photo");
               if (img) {
                       img.src = "images/portfolio/" + num + "n.jpg";
               }


           document.getElementById("photoNumber" + selectedLinkNum).style["color"] = "#999999";
           document.getElementById("photoNumber" + num).style["color"] = "#990000";

           selectedLinkNum = num;               
       }
	   


       this.openPreviousLink = function() {
           var num = selectedLinkNum - 1;
           if (num < 1) {
               num = 1;
           }
           this.openPhotoLink(num);
       }

       this.openNextLink = function() {
           var num = selectedLinkNum + 1;
    
           this.openPhotoLink(num);
		   

		// image name
		var imageName = document.getElementById("imageName");
		imageName.innerHTML = imageNameMap[num-1];
		

		document.getElementById("photoNumber" + selectedLinkNum).style["color"] = "#999999";
		document.getElementById("photoNumber" + num).style["color"] = "#990000";
	
	    selectedLinkNum = num;		   
		   
       }


}