function addtext(veld,text) {
	text = ''+text+'';
  	if (document.form.elements[veld].createTextRange) {
  		document.form.elements[veld].focus();
  		document.selection.createRange().duplicate().text = text;
   	} else {
		document.form.elements[veld].focus();
  		document.form.elements[veld].value += text;
   	}
}