var DDSPEED=5;var DDTIMER=15;
// main function to handle the mouse events //
function ddMenu(id,d){var h=document.getElementById(id+'-ddheader');var c=document.getElementById(id+'-ddcontent');clearInterval(c.timer);if(d==1){clearTimeout(h.timer);if(c.maxh&&c.maxh<=c.offsetHeight){return}
else if(!c.maxh){c.style.display='block';c.style.height='auto';c.maxh=c.offsetHeight;c.style.height='0px';}
c.timer=setInterval(function(){ddSlide(c,1)},DDTIMER);}else{h.timer=setTimeout(function(){ddCollapse(c)},50);}}
// collapse the menu //
function ddCollapse(c){c.timer=setInterval(function(){ddSlide(c,-1)},DDTIMER);}
// cancel the collapse if a user rolls over the dropdown //
function cancelHide(id){var h=document.getElementById(id+'-ddheader');var c=document.getElementById(id+'-ddcontent');clearTimeout(h.timer);clearInterval(c.timer);if(c.offsetHeight<c.maxh){c.timer=setInterval(function(){ddSlide(c,1)},DDTIMER);}}
// incrementally expand/contract the dropdown and change the opacity //
function ddSlide(c,d){var currh=c.offsetHeight;var dist;if(d==1){dist=(Math.round((c.maxh-currh)/DDSPEED));}else{dist=(Math.round(currh/DDSPEED));}
if(dist<=1&&d==1){dist=1;}
c.style.height=currh+(dist*d)+'px';c.style.opacity=currh/c.maxh;if((currh<2&&d!=1)||(currh>(c.maxh-2)&&d==1)){clearInterval(c.timer);}}