if (document.images) { 

            img1on = new Image();      
			img1on.src = "images/slk_whoweare-on.gif"; 
			img2on = new Image();      
			img2on.src = "images/slk_wayswecanhelp-on.gif";
			img3on = new Image();      
			img3on.src = "images/slk_expertise-on.gif";
			img4on = new Image();      
			img4on.src = "images/slk_portfolio-on.gif";
			img5on = new Image();      
			img5on.src = "images/slk_clientskudos-on.gif";
			img6on = new Image();      
			img6on.src = "images/slk_articlesinfo-on.gif";
			img7on = new Image();      
			img7on.src = "images/slk_newsletterarchive-on.gif";
			img8on = new Image();      
			img8on.src = "images/slk_contactusnow-on.gif";
			img9on = new Image();      
			img9on.src = "images/slk_search-on.gif";
            
            img1off = new Image();      
			img1off.src = "images/slk_whoweare-off.gif"; 
			img2off = new Image();      
			img2off.src = "images/slk_wayswecanhelp-off.gif";
			img3off = new Image();      
			img3off.src = "images/slk_expertise-off.gif";
			img4off = new Image();      
			img4off.src = "images/slk_portfolio-off.gif";
			img5off = new Image();      
			img5off.src = "images/slk_clientskudos-off.gif";
			img6off = new Image();      
			img6off.src = "images/slk_articlesinfo-off.gif";
			img7off = new Image();      
			img7off.src = "images/slk_newsletterarchive-off.gif";
			img8off = new Image();      
			img8off.src = "images/slk_contactusnow-off.gif";
			img9off = new Image();      
			img9off.src = "images/slk_search-off.gif";
        }

// Images turn on.

function imgOn(imgName) {

        if (document.images) {

            document[imgName].src = eval(imgName + "on.src");

        }

}

// Images turn off.

function imgOff(imgName) {

        if (document.images) {

            document[imgName].src = eval(imgName + "off.src");

        }

}