function clearDate(dateField) {
	myInput = findObj(dateField);
	myInput.value = "";
}

var currDesc = 0;

function hideDescription(index) {
		myDesc = findObj('description' + index);
		myDesc.style.display = 'none';
}

function showDescription(index) {
		myDesc = findObj('description' + index);
		myDesc.style.display = 'block';
}
							  
function updateDescription(mySelect) {
	hideDescription(currDesc);
	currDesc = mySelect.selectedIndex;
	showDescription(currDesc);
}

// Example: obj = findObj("image1");
function findObj(theObj, theDoc) {
	var p, i, foundObj;
	
	if(!theDoc) theDoc = document;
	if( (p = theObj.indexOf("?")) > 0 && parent.frames.length) {
		theDoc = parent.frames[theObj.substring(p+1)].document;
		theObj = theObj.substring(0,p);
	}
	if(!(foundObj = theDoc[theObj]) && theDoc.all) foundObj = theDoc.all[theObj];
	for (i=0; !foundObj && i < theDoc.forms.length; i++) 
		foundObj = theDoc.forms[i][theObj];
	for(i=0; !foundObj && theDoc.layers && i < theDoc.layers.length; i++) 
		foundObj = findObj(theObj,theDoc.layers[i].document);
	if(!foundObj && document.getElementById) foundObj = document.getElementById(theObj);
	
	return foundObj;
}

var popUpWin=0;
function popUpWindow(URLStr, left, top, width, height) {
  if(popUpWin) {
    if(!popUpWin.closed) popUpWin.close();
  }
  popUpWin = open(URLStr, 'popUpWin', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbar=no,resizable=no,copyhistory=no,width='+width+',height='+height+',left='+left+', top='+top+',screenX='+left+',screenY='+top+'');
}