function expandBox(tag) {

	var aStrongTemp = tag.getElementsByTagName('strong');
	if (aStrongTemp[0].className == 'question'){
		var strtag = aStrongTemp[0];
	}
	
	
	if(tag.className=="def"){
		tag.className = 'act';
		strtag.style.background = 'url(./images/arw_open.gif) no-repeat 33px 5px';
	}else{
		tag.className ='def';
		strtag.style.background = 'url(../common/images/arw2.gif) no-repeat 33px 5px';
	}
}