function windowOpen(link){
window.open(link,'PopUp','left='+(screen.availWidth/2-0)+',top='+(screen.availHeight/2-0)+'');
}
function showBlender(){
	document.getElementById('blender').style.visibility = 'visible';
}
function changeFieldValueAndStyle(fieldname){
  document.getElementsByName(fieldname)[0].value='';
  document.getElementsByName(fieldname)[0].style.color='#000000';
}
function changeFieldStyle(fieldname){
  document.getElementsByName(fieldname)[0].style.color='#000000';
}
function clientUpload(url){
window.open(url,'clientUpload','width=450,height=330,scrollbars=no, resizable=no,status=no');
}

function changeWunschtermin(formular){
	if(document.bookSeminarIndi.date.selectedIndex == '1'){
		document.getElementById('normalTime').style.display='none';
		document.getElementById('normalDauer').style.display='none';
		document.getElementById('normalDauerTitle').style.display='none';
		document.getElementById('vorschlag').style.display='';
		document.getElementsByName('date_alt').value='';
	}else{
		document.getElementById('normalTime').style.display='';
		document.getElementById('normalDauer').style.display='';
		document.getElementById('normalDauerTitle').style.display='';
		document.getElementById('vorschlag').style.display='none';
		document.forms.bookSeminarIndi.submit();
	}
}