function druckansicht(url,breite,hoehe)
{
var url;
var width=breite;
var height=hoehe;
var l = (screen.availWidth - width) / 2;
var t = (screen.availHeight - height) / 2;
windowHandle = window.open(url,"druckansicht","width="+breite+",height=" +hoehe+",screenX="+l+",screenY="+t+",left=" +l+",top="+t+",scrollbars=1,resizable=0,menubar=no"); windowHandle.focus()

}

		var browserName = navigator.appName;
		var browserVer = parseInt(navigator.appVersion);
		var version = "";
		var msie4 = (browserName == "Microsoft Internet Explorer" && browserVer >= 4);
		if ((browserName == "Netscape" && browserVer >= 3) || msie4 || browserName=="Konqueror" || browserName=="Opera") {version = "n3";} else {version = "n2";}
			// Blurring links:
		function blurLink(theObject)	{	//
			if (msie4)	{theObject.blur();}
		}


function checkrequired() {

   var fields = 0
   var i = 0
   var empty = true
   var fields = document.form1.length
   var textvalue = ""

   for (i = 0; i < fields ; i++) {
      switch (document.form1.elements[i].type){
      case "select-one" :
      case "select-multiple" :
         if (document.form1.elements[i].selectedIndex != -1)
	{
            empty = false
         }
      break;
      case "checkbox" :
         if ( document.form1.elements[i].checked) {
            empty = false
         }
      break;
      default :
	break;
      }
   }

   if (!empty) {
      document.form1.submit();
   } else {
      alert ("You must select at least one item.")
   }
}