function setHorizontal(){
	var iWidth = document.body.clientWidth;
	$('mainCenter').style.left = (iWidth - 998 )/2+'px';
}

function deletetext() {
	if (document.getElementById('memberEmail').value=='emailc�m') {
		document.getElementById('memberEmail').value='';
	}
	if (document.getElementById('memberEmail').value=='Ihre Emailadresse...') {
		document.getElementById('memberEmail').value='';
	}
}

function validate(form_id,email) {
	   var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	   var address = document.forms[form_id].elements[email].value;
	   if(reg.test(address) == false) {
	      alert('Falsche Emailadresse!');
	      return false;
	   }
	   else return true
	}