function externalLinks()
{ 
	if (!document.getElementsByTagName) return; 
	var anchors = document.getElementsByTagName("a"); 
	for (var i=0; i<anchors.length; i++)
	{ 
		var anchor = anchors[i]; 
		if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "external" || anchor.getAttribute("href") && anchor.getAttribute("rel") == "nofollow") 
		anchor.target = "_blank"; 
	} 
} 
window.onload = externalLinks;

function letters(evt)
{
	var charCode = (evt.which) ? evt.which : evt.keyCode;
	if ((charCode >=65 && charCode <=90) || (charCode >=97 && charCode <=122) || charCode == 8 || charCode == 9)
	{
		return true;
	} //Alleen letters, Hoofdletters en backspace toegestaan
return false;
}

function cijfers(evt)
{
	var charCode = (evt.which) ? evt.which : evt.keyCode;
	if ((charCode >= 48 && charCode <=57) || charCode == 8 || charCode == 9)
	{ 
		return true;
	} // Alleen maar cijfers en backspace toegestaan
return false;
}

function letterscijfers(evt)
{
	var charCode = (evt.which) ? evt.which : evt.keyCode;
	if ((charCode >=65 && charCode <=90) || (charCode >=97 && charCode <=122) || (charCode >= 48 && charCode <=57) || charCode == 8 || charCode == 9)
	{ 
		return true;
	} // Alleen maar letters, hoofdletters, cijfers en backspace toegestaan
return false;
}

function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function prepareInputsForHints() {
	var inputs = document.getElementsByTagName("input");
	for (var i=0; i<inputs.length; i++){
		// test to see if the hint span exists first
		if (inputs[i].parentNode.getElementsByTagName("span")[0]) {
			// the span exists!  on focus, show the hint
			inputs[i].onfocus = function () {
				this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
			}
			// when the cursor moves away from the field, hide the hint
			inputs[i].onblur = function () {
				this.parentNode.getElementsByTagName("span")[0].style.display = "none";
			}
		}
	}
	// repeat the same tests as above for selects
	var selects = document.getElementsByTagName("select");
	for (var k=0; k<selects.length; k++){
		if (selects[k].parentNode.getElementsByTagName("span")[0]) {
			selects[k].onfocus = function () {
				this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
			}
			selects[k].onblur = function () {
				this.parentNode.getElementsByTagName("span")[0].style.display = "none";
			}
		}
	}
}
addLoadEvent(prepareInputsForHints);