function dsp(loc){
if(document.getElementById){
var foc=loc.firstChild;
foc=loc.firstChild.innerHTML?
loc.firstChild:
loc.firstChild.nextSibling;
foc.innerHTML=foc.innerHTML=='+'?'-':'+';
foc=loc.parentNode.nextSibling.style?
loc.parentNode.nextSibling:
loc.parentNode.nextSibling.nextSibling;
foc.style.display=foc.style.display=='block'?'none':'block';
}
}