ie4 = (document.all)? true:false;

function show(id) {
	var elem = document.getElementById(id);

	if (elem) {
		elem.style.visibility = "visible";
		
		// ie6 workaround (seems not to like visibility:none combined with border-collapse: collapse)
		var children = elem.childNodes;
		for (var i = 0; i < children.length; i++) {
			if (children[i].nodeName == "TABLE") {
				children[i].style.borderCollapse = "collapse";
			}
		}
	}
}

function hide(id) {
	if (ie4) document.all[id].style.visibility = "hidden"
	else document.getElementById(id).style.visibility = "hidden"
}

function MM_validateForm() { //v4.0
  if (document.getElementById){
    var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
    for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=document.getElementById(args[i]);
      if (val) { nm=val.name.toUpperCase(); if ((val=val.value)!="") {
        if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
          if (p<1 || p==(val.length-1)) errors+='- '+nm+' muss eine gültige E-Mail Adresse sein.\n';
        } else if (test!='R') { num = parseFloat(val);
          if (isNaN(val)) errors+='- '+nm+' muss eine gültige Zahl sein.\n';
          if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
            min=test.substring(8,p); max=test.substring(p+1);
            if (num<min || max<num) errors+='- '+nm+' muss eine Zahl zwischen '+min+' und '+max+' sein.\n';
      } } } else if (test.charAt(0) == 'R') errors += '- '+nm+' muss eingegeben werden.\n'; }
    } if (errors) alert('Eingabefehler aufgetreten:\n'+errors);
    document.MM_returnValue = (errors == '');
} }