// JavaScript Document
  function checklength(element) {
		if(element.value.length>=180) element.value=element.value.substr(0,180);		
		document.getElementById("restzeichen").value=180-element.value.length;
	}

    
function errorseen() {
	document.getElementById("error").style.display='none';
}

function checkvermregnr(show) {
	if(show==1) document.getElementById("tdvermregnr").style.visibility='visible';
	else document.getElementById("tdvermregnr").style.visibility='hidden';
	
}

function showsub(nr) {
	
	for(i=1;i<=4;i++) {
		document.getElementById("sub_"+nr).style.display='none';
	}
	document.getElementById("sub_"+nr).style.display='block';	
}