var imgarr=new Array(27);
var urlarr=new Array(27);
var imgcolln= new Array(27);
var curslide=0;
var im=0;
function preLoad()
{
    //document.write("<a href='javascript:showPage()'>");
		document.write("<img name=imgs  src='" +imgarr[0] + "' border=0>");
		//document.write("</a>");		
          var len=imgarr.length;	       
          for(j=0;j<len; j++)
          {
                     imgcolln[j]=new Image();
                     var astr=imgarr[j];
                     imgcolln[j].src=astr;
          }
}

// to generate image link code that links the image to a webpage 
function registerImageUrl(imgname,urlname)
{
		if(im<26)
		{
			imgarr[im]=imgname;
			urlarr[im]=urlname;
			im++;
		}
		else
		{
			alert("warning array is already full");
		}	
}

function startAnimation()
{
	document.images["imgs"].src=imgcolln[curslide].src;
	var store_slide=curslide;
	curslide=curslide+1;
	if(curslide==im)
		curslide=0;
	setTimeout("startAnimation()",5500);
	var str_length = imgcolln[store_slide].src.length;
	var last_pos = imgcolln[store_slide].src.lastIndexOf("/");
	var wrking_text = imgcolln[store_slide].src.substring(last_pos+1,str_length-4);
	var str_length = wrking_text.length;
	var last_pos = wrking_text.lastIndexOf("-");	
	var first_pos = wrking_text.indexOf("_");
	var wrking_text = wrking_text.substring(first_pos+1);
	var wrking_text = wrking_text.replace(/_/g, " ");
	var wrking_text = wrking_text.toUpperCase();

	document.images["left_overlay"].title=wrking_text;
	document.images["left_overlay"].alt=wrking_text;	
}

function showPage()
{
	curslide=curslide-1;
	if(curslide==-1)
		curslide=im-1;	
	location.href=urlarr[curslide];
	
}