function showtext(rollovertext) {
	var rolloverelement;
	if (typeof(document.getElementById) != "undefined") {
		rolloverelement = document.getElementById('rollover');
	} else {
		rolloverelement = document.all['rollover'];
	}
	rolloverelement.innerHTML = rollovertext;
}

function launchCentered (varURL, varName, varWidth, varHeight, varFeatures) {
  if (!varName) varName = '';
  if (!varFeatures) 
		varFeatures = '';
  else
    varFeatures = ',' + varFeatures;
			    
  var x = Math.round((screen.availWidth - varWidth) / 2);
  var y = Math.round((screen.availHeight - varHeight) / 2);
			  
  varFeatures = 'left=' + x + ',top=' + y + ',width=' + varWidth + ',height=' + varHeight + varFeatures;
			  
  if (window.showModalDialog && (varFeatures.indexOf('modal=yes') > 0 ))  
	window.showModalDialog(varURL,varName, 'dialogTop:' + y + ';dialogLeft:' + x + ';dialogWidth:' + varWidth + 'px;dialogHeight:' + varHeight + 'px');
  else			  
	window.open(varURL,varName,varFeatures);				  
}