var isIE=(navigator.userAgent.indexOf('MSIE')!=-1);function setOpacity(this_,opacity)
{if(opacity==0)
{if(this_.style.visibility!="hidden")
this_.style.visibility="hidden";}
else
{if(this_.style.visibility!="visible")
this_.style.visibility="visible";}
if(isIE)
this_.style.filter=(opacity==1)?'':"alpha(opacity="+opacity*100+")";this_.style.opacity=opacity;return this;};function bgOver(this_)
{setOpacity(this_,0.5);};function bgOut(this_)
{setOpacity(this_,1);};