if (document.images) {   
	var load = 0;    
	oil1On = new Image();	oil1On.src	=	"i/clearbore/oil_c.gif";
	oil1Off = new Image();	oil1Off.src	=	"i/clearbore/oil.gif";
	oil2On = new Image();	oil2On.src	=	"i/clearbore/oilimg_c.jpg";
	oil2Off = new Image();	oil2Off.src	=	"i/clearbore/oilimg.jpg";

	hdd1On = new Image();	hdd1On.src	=	"i/clearbore/hdd_c.gif";
	hdd1Off = new Image();	hdd1Off.src	=	"i/clearbore/hdd.gif";
	hdd2On = new Image();	hdd2On.src	=	"i/clearbore/hddimg_c.jpg";
	hdd2Off = new Image();	hdd2Off.src	=	"i/clearbore/hddimg.jpg";

		
	fnd1On = new Image();	fnd1On.src	=	"i/clearbore/fnd_c.gif";
	fnd1Off = new Image();	fnd1Off.src	=	"i/clearbore/fnd.gif";
	fnd2On = new Image();	fnd2On.src	=	"i/clearbore/fndimg_c.jpg";
	fnd2Off = new Image();	fnd2Off.src	=	"i/clearbore/fndimg.jpg";
		
	load = 1;
}

function imgOn(imgName){

	if (load==1){
		if (document.images){
			srcname1 = eval(imgName + "1On.src");
			srcname2 = eval(imgName + "2On.src");
			if (document[imgName + '1'].src != srcname1){
				document[imgName + '1'].src = srcname1;				
				document[imgName + '2'].src = srcname2;	
				
				switch (imgName){
					case 'oil':						
						document.getElementById("oil_div").style.display = 'block';
						imgOff1('hdd');
						imgOff1('fnd');
						descr_td
						break;
					case 'hdd':
						document.getElementById("hdd_div").style.display = 'block';
						imgOff1('oil');
						imgOff1('fnd');	
						break;
					case 'fnd':
						document.getElementById("fnd_div").style.display = 'block';	
						imgOff1('oil');
						imgOff1('hdd');
						break;				
				}
			}
		}
	}
}

function imgOff1(imgName){
	if (load==1){
		if (document.images){
			srcname1 = eval(imgName + "1Off.src");
			srcname2 = eval(imgName + "2Off.src");
			if (document[imgName+'1'].src != srcname1){
				document[imgName + '1'].src = srcname1;				
				document[imgName + '2'].src = srcname2;	
				document.getElementById(imgName + '_div').style.display = 'none';
				oil_td1.className=oil_td2.className=hdd_td1.className=hdd_td2.className=fnd_td1.className=fnd_td2.className='';
				descr_td.className='';
			}
		}
	}
}