var imgArray = ["7551", "8895", "7403", "8908", "7533", "8938", "8942", "8973", "7411", "9090", "7429", "9214", "9226", "9238", "9420", "9429","7465","9936","9956","9976"];
var nameArray = ["Style# 3112 Triple strand Amethyst stones", " Style #1028 Onyx and Swarovski crystals - 24''", " Style #3102 Double strand necklace with wood, horn and silver beads", " Style #1060 Pearls and crystals - 16''", "Style #3101 Sterling chain, mother of pearl", "Style #1022 Carnelian with gold pendant - 16''", "Style#1023 Beaded necklace  malachite beads , yellow agate cylinders - 16''", "Style #1050 Triple strand beaded necklace  bali silver with Swarovski crystal - 16-18''", "Style #3099 Long interlocked squares of horn and glass beads", "Style #1052 Triple strand beaded necklace with silver nugget white mother of pearl", "Style #3100 Long necklace of grey mother of pearl", "Style #1057 Beaded  necklace agate pendant, gold beads, black faceted resin beads - 16''", "Style #1056 Necklace black resin faceted beads, black rice and silver baroque beads, abalone shell  - 34''", "Style #1062 Four ply copper chain white agate pendant, sterling clasp - 17''", "Style #1059 Necklace sterling chain, white agate, copper bali beads, carnelian, crystal, red cat's eye - 24''", "Style #1058 Necklace sterling chain red jasper cylinders with copper bali beads and crystal pendant - 30''","Style #3103 -Sterling chain, mother of pearl" ,"Style # 1112 - venetian glass beads, white jade and onyx, gold Czech glass beads","Style # 1111 - copper Czech glass beads and  chalcedony","Style # 1113 - Onyx and crystal - 16''"];   
var imgNum = 0;
function startup()
{
   document.getElementById("previous").disabled = true;
   document.getElementById("previous").src= "images/prev_off.gif";
}
function changeImage(direction)
	{  
	    imgNum = imgNum + direction;
		document.getElementById("jewelry").src = "images/" + imgArray[imgNum] + ".jpg";
		document.getElementById("name").innerHTML = nameArray[imgNum];
		
		if (imgNum >= nameArray.length-1)
		{
		   
		   document.getElementById("next").disabled = true;	 
		}
		
		else if(imgNum <= 0)
		{
		  
		   document.getElementById("previous").disabled = true;	
		   
		}
		else 
		{
		   document.getElementById("previous").disabled = false;
		   document.getElementById("next").disabled = false;			
		}
		if (imgNum >= nameArray.length-1)
		{
		   document.getElementById("next").src = "images/next_off.gif";	 
		}
		
		else if(imgNum <= 0)
		{
		   document.getElementById("previous").src= "images/prev_off.gif";
		}
		else 
		{
		   document.getElementById("next").src = "images/next.gif";
		   document.getElementById("previous").src = "images/prev.gif";		
		}
	}