var state='visible';function hide(layer_ref){if(state=='visible'){state='hidden';}
if(document.all){eval("document.all."+layer_ref+".style.visibility = state");}
if(document.layers){document.layers[layer_ref].visibility=state;}
if(document.getElementById&&!document.all){maxwell_smart=document.getElementById(layer_ref);maxwell_smart.style.visibility=state;}}
function show(layer_ref){if(state=='hidden'){state='visible';}
if(document.all){eval("document.all."+layer_ref+".style.visibility = state");}
if(document.layers){document.layers[layer_ref].visibility=state;}
if(document.getElementById&&!document.all){maxwell_smart=document.getElementById(layer_ref);maxwell_smart.style.visibility=state;}}