function na_preload_img(){var b=na_preload_img.arguments;if(document.preloadlist==null)document.preloadlist=[];var c=document.preloadlist.length;for(var a=0;a<b.length-1;a++){document.preloadlist[c+a]=new Image;document.preloadlist[c+a].src=b[a+1]}}function na_change_img_src(name,nsdoc,rpath,preload){var img=eval(navigator.appName.indexOf("Netscape",0)!=-1?nsdoc+"."+name:"document.all."+name);if(name=="")return;if(img){img.altsrc=img.src;img.src=rpath}}function na_restore_img_src(name,nsdoc){var img=eval(navigator.appName.indexOf("Netscape",0)!=-1?nsdoc+"."+name:"document.all."+name);if(name=="")return;if(img&&img.altsrc){img.src=img.altsrc;img.altsrc=null}}