if(document.images) {
        img21on = new Image();              //create mouseover image objects
        img21on.src = "images/main_on.gif";             
        img22on = new Image();                           
        img22on.src = "images/reg_on.gif";
	    img23on = new Image();
        img23on.src = "images/agenda_on.gif";	
	    img24on = new Image();
        img24on.src = "images/sessinfo_on.gif";	
	    img26on = new Image();
        img26on.src = "images/exhibitors_on.gif";
		img27on = new Image();
        img27on.src = "images/hotelinfo_on.gif";
		img28on = new Image();
        img28on.src = "images/fun_on.gif";
		img29on = new Image();
        img29on.src = "images/winwriters_on.gif";

    
        img21off = new Image();                   //create mouseout image objects
        img21off.src = "images/main_off.gif";            
        img22off = new Image();                           
        img22off.src = "images/reg_off.gif";
	    img23off = new Image();
        img23off.src = "images/agenda_off.gif";	
	    img24off = new Image();
        img24off.src = "images/sessinfo_off.gif";	
	    img26off = new Image();
        img26off.src = "images/exhibitors_off.gif";    
		img27off = new Image();
        img27off.src = "images/hotelinfo_off.gif"; 
		img28off = new Image();
        img28off.src = "images/fun_off.gif"; 
		img29off = new Image();
        img29off.src = "images/winwriters_off.gif";
 
}

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

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}

// function for topbanner navigation
function openWin() {
aWindow=window.open("http://www.winwriters.com/contact_popup.htm", "thewindow", "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=350,height=380,top=1,left=80");
}