var visitObj=true;
function chngDef(nm, vl){

	var targetElement = document.getElementById(nm);
	
	if ((targetElement.value=="" || (typeof targetElement.value==null)) && visitObj==true) {
		targetElement.value=vl;
		targetElement.style.color="#666666";
	}
	if (targetElement.value==vl) {
		targetElement.value;
		targetElement.style.color="#000";
		visitObj==true
	}
}	//function chngDef(nm, vl)

function displayToggle(what, img, offState, onState){
  var disObj = document.getElementById(what);

  if(disObj.style.display=="none" || 
	 !disObj.style.display ){
	  disObj.style.display="block";
      imgState=onState;
  }
  else {
	  disObj.style.display="none";
	  imgState=offState;
  }
  
  if(img && offState!="" && onState!=""){
	  var chImg=document.getElementById(img);
	  chImg.innerHTML=imgState;
  }  //if(img && offState!="" && onState!="")
  
}  //function displayToggle(what, img, offState, onState)

function sda_truth_display(ans) {
	var ie=document.all && !window.opera;
	var dom=document.getElementById;
	objref=(dom)? document.getElementById(ans) : document.all(ans);
	if (objref.style.visibility=="visible"){
		objref.style.visibility="hidden";
	}	//if (objref.style.visibility=="visible")
	else {
		objref.style.visibility="visible";
	}	//if (objref.style.visibility=="visible") else
	//alert ('test now');
}	//sda_truth_display