function getElement(id) {
    if (document.getElementById(id)) {
        return document.getElementById(id);
    } else {
        alert('Element ' + id + ' is niet gevonden!');
    }
}


function inpFocus(obj, stdText) {
  if (obj.value == stdText) {
     obj.value = '';
  }
}

function inpBlur(obj, stdText) {
  if (obj.value == '') {
     obj.value = stdText;
  }
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function showOnly(showId, parentId, tagName) {
                var parObj = document.getElementById(parentId);
                var tagType = "DIV";
                if (tagName) {
                    tagType = tagName.toUpperCase();
                }
                if (parObj) {
                    var children = parObj.childNodes;
                    // alert(db_DumpTree(children, ''));
                    for(c = 0; c < children.length; c++) {
                        if (children[c].nodeName == tagType ) {
// alert(children[c].id + " "+ children[c].style.display);
                            if (children[c].id == showId) {
if (children[c].style.display == "none") {
                                children[c].style.display = 'block';
} else {
                               children[c].style.display = 'none';
}
                            } else {
                                children[c].style.display = 'none';
                            }
                        }
                    }
                }
            }

function setSelectListToValue(value, selectId){

	var i, si, v, args=setSelectListToValue.arguments;
	if ((obj=document.getElementById(args[1])) != null){
		v = args[0];
		for(i=0; i<obj.length; i++){
			if(obj.options[i].value == v){
				si = i;
			}
		}
		obj.selectedIndex = si;
	}
}


/*
**
** findForm
**
** finds containing form for the given object
** if instructed, submits form
** returns formobject or null if not found
**
*/
function findForm(obj, verzend) {
  while (obj && obj.tagName != "FORM" && obj.parentNode) {
          obj = obj.parentNode;
  }
  if (obj.tagName == "FORM") {
     if (verzend) {
         obj.submit();
     }
     return obj;
  }
  return null;
}