function addEvent(elem,evtType,func){if(elem.addEventListener){elem.addEventListener(evtType,func,false);}else if(elem.attachEvent){elem.attachEvent("on"+evtType,func);}else{elem["on"+evtType]=func;}}
function remEvent(elem,evtType,func){if(elem.removeEventListener){elem.removeEventListener(evtType,func,false);}else if(elem.detachEvent){elem.detachEvent("on"+evtType,func);}else{elem["on"+evtType]=null;}}
function unfold(){remEvent(pstr,"mouseover",unfold);addEvent(pstr,"load",fullview);pstr.src="./img/unfoldPoster.gif";}
function fullview(){remEvent(pstr,"load",fullview);addEvent(pstr,"mouseout",fold);}
function fold(){remEvent(pstr,"mouseout",fold);addEvent(pstr,"load",reset);pstr.src="./img/foldPoster.gif";}
function reset(){remEvent(pstr,"load",reset);setTimeout('pstr.src="./img/apff_2009poster.jpg";addEvent(pstr,"mouseover",unfold);',600);}