function addEvent(c,a,b){if(c.addEventListener){c.addEventListener(a,b,false)}else{if(c.attachEvent){c["e"+a+b]=b;c[a+b]=function(){c["e"+a+b](window.event)};c.attachEvent("on"+a,c[a+b])}else{throw"Cannot add event listener"}}}function hasClassName(d,e){var b=d.className.split(" ");for(var c=0;c<b.length;c++){if(b[c]==e){return true}}return false}function addClassName(a,b){removeClassName(a,b);a.className+=" "+b}function removeClassName(e,f){var c="";var b=e.className.split(" ");for(var d=0;d<b.length;d++){if(b[d]!=f){if(d>0){c+=" "}c+=b[d]}}e.className=c};