function expand(answerID){
var d=document.getElementById(answerID);
var ie = (document.all)? true: false
if (ie) 
	d.style.display="block";
else 
	d.style.display="table-row";
}

function collapse(answerID){
var d=document.getElementById(answerID);
d.style.display="none";
}

function getElementbyClass(classname){ 
 var inc=0; 
 var alltags=document.all? document.all : document.getElementsByTagName("*"); 
 var answerClass=new Array(); 

 for (i=0; i<alltags.length; i++){ 
   if (alltags[i].className==classname) 
     answerClass[inc++]=alltags[i]; 
 } 
 return answerClass;
} 

function collapseAll() {
d=getElementbyClass("answer");
for (i=0; i<d.length; i++){ 
d[i].style.display="none";
}
}