//image swapping for MouseOver effects for side nav and top nav
function filter(image_headername,objectsrc)
{
    var n=navigator.appName
    var v=parseInt(navigator.appVersion)
    var browsok=((n=="Netscape")&&(v>=3))
    var browsok2=((n=="Microsoft Internet Explorer")&&(v>=4))
    if (browsok){       //handle Netscape 4.7 (6.2 is same as IE)
        if (version >= 5){                  //handle netscape 6
			if (image_headername != currentSection){
	            document.images[image_headername].src=eval(objectsrc+".src")
			}
        }
        else{                               //handle netscape 4.7
			if (image_headername != currentSection){
	            eval("document.images[image_headername].src="+objectsrc+".src")
			}
        }
    }
    else if (browsok2){ //handle IE
		if (image_headername != currentSection){
	        document.images[image_headername].src=eval(objectsrc+".src")
		}
    }
}