var curNav=0;var curBacknav=0;function setNav(A){curNav=A}function setBacknav(A){curBacknav=A}function navInit(){navSwap("","nav",curNav);navSwap("backnavDiv","backnav",curBacknav)}function navPreload(imgName){if(document.images){eval(imgName+" = new Image()");eval(imgName+'.src = "images/'+imgName+'.gif"')}}navPreload("nav_button");navPreload("back_arrow");navPreload("onepx");function navSwap(layerID,imgName,imgNumber){var imgNameOld,imgNameNew,imgObj;if(imgName=="nav"){imgObj="nav_button";imgNameOld="nav"+curNav;imgNameNew="nav"+imgNumber;curNav=imgNumber}else{imgObj="back_arrow";imgNameOld="backnav"+curBacknav;imgNameNew="backnav"+imgNumber;curBacknav=imgNumber}if(document.layers){if(layerID==""){if(eval('document.images["'+imgNameOld+'"]')!=null){eval('document.images["'+imgNameOld+'"].src = onepx.src')}if(eval('document.images["'+imgNameNew+'"]')!=null){eval('document.images["'+imgNameNew+'"].src = '+imgObj+".src")}}else{if(eval("document."+layerID)!=null){if(eval("document."+layerID+'.document.images["'+imgNameOld+'"]')!=null){eval("document."+layerID+'.document.images["'+imgNameOld+'"].src = onepx.src')}if(eval("document."+layerID+'.document.images["'+imgNameNew+'"]')!=null){eval("document."+layerID+'.document.images["'+imgNameNew+'"].src = '+imgObj+".src")}}}}else{if(document.images[imgNameOld]!=null){document.images[imgNameOld].src=eval("onepx.src")}if(document.images[imgNameNew]!=null){document.images[imgNameNew].src=eval(imgObj+".src")}}};