if (document.images) {
		
	//tab images
		img1on = new Image();		img1on.src = "/english/benefits/images/topnav/hlanguage.gif";  
		img2on = new Image();		img2on.src = "/english/benefits/images/topnav/hsitemap.gif";  
		img3on = new Image();		img3on.src = "/english/benefits/images/topnav/hmembers.gif";  
		img4on = new Image();		img4on.src = "/english/benefits/images/topnav/hcontact.gif";  
		img5on = new Image();		img5on.src = "/english/benefits/images/topnav/hhome.gif";  
		
        img1off = new Image();		img1off.src = "/english/benefits/images/topnav/language.gif"; 
		img2off = new Image(); 		img2off.src = "/english/benefits/images/topnav/sitemap.gif";
		img3off = new Image(); 		img3off.src = "/english/benefits/images/topnav/members.gif";
		img4off = new Image(); 		img4off.src = "/english/benefits/images/topnav/contact.gif";
		img5off = new Image(); 		img5off.src = "/english/benefits/images/topnav/home.gif";
	
		
	//menu images
        img10on = new Image();		img10on.src = "/english/benefits/images/leftnav/hcareersite.gif";  
		img11on = new Image();		img11on.src = "/english/benefits/images/leftnav/hcorporate.gif";  
		img13on = new Image(); 		img13on.src = "/english/benefits/images/leftnav/hhotel.gif";
		img14on = new Image();		img14on.src = "/english/benefits/images/leftnav/hcar.gif";
	    img15on = new Image();		img15on.src = "/english/benefits/images/leftnav/hconvention.gif";
		img16on = new Image();		img16on.src = "/english/benefits/images/leftnav/hpersonal.gif";
		img17on = new Image();		img17on.src = "/english/benefits/images/leftnav/hcbsc.gif";
		img18on = new Image();		img18on.src = "/english/benefits/images/leftnav/hgoldribbon.gif";
		img19on = new Image();		img19on.src = "/english/benefits/images/leftnav/hindustry.gif";
		img20on = new Image();		img20on.src = "/english/benefits/images/leftnav/hgroup.gif";
	
		
		
        img10off = new Image();		img10off.src = "/english/benefits/images/leftnav/careersite.gif"; 
		img11off = new Image(); 	img11off.src = "/english/benefits/images/leftnav/corporate.gif"; 
		img13off = new Image();		img13off.src = "/english/benefits/images/leftnav/hotel.gif";
		img14off = new Image();		img14off.src = "/english/benefits/images/leftnav/car.gif";
        img15off = new Image();		img15off.src = "/english/benefits/images/leftnav/convention.gif";
		img16off = new Image();		img16off.src = "/english/benefits/images/leftnav/personal.gif";
		img17off = new Image();		img17off.src = "/english/benefits/images/leftnav/cbsc.gif";
		img18off = new Image();		img18off.src = "/english/benefits/images/leftnav/goldribbon.gif";
		img19off = new Image();		img19off.src = "/english/benefits/images/leftnav/industry.gif";
		img20off = new Image();		img20off.src = "/english/benefits/images/leftnav/group.gif";
		
		
		
			
}


var lockedImg = "";

function imgOn(imgName) {
	if (document.images) {
			document[imgName].src = eval(imgName + "on.src");
	}
}

function imgOff(imgName) {
	if (document.images) {
	    if(lockedImg != imgName){
			document[imgName].src = eval(imgName + "off.src");
		}
	}
}


function lockImg(imgName)	{
	document[imgName].src = eval(imgName + "on.src");
	lockedImg = imgName;
}