function startUpload(){
      document.getElementById('f1_upload_process').style.visibility = 'visible';
      document.getElementById('f1_upload_form').style.visibility = 'hidden';
      return true;
}

function stopUpload(success){
      var result = '';
      if (success == 1){
		  
         result = '<span class="msg">Je afbeelding is succesvol geuploaded. </span>';
      }
      else {
         result = '<span class="emsg">There was an error during file upload!<\/span><br/><br/>';
      }
      document.getElementById('f1_upload_process').style.visibility = 'hidden';
      document.getElementById('f1_upload_form').innerHTML = result + '<label>File: <input name="myfile" type="file" size="30" /><\/label><label><input type="submit" name="submitBtn" value="Upload" /><\/label>';
      document.getElementById('f1_upload_form').style.visibility = 'visible';
	  window.location = window.location.href;
      return true; 
	  
}// JavaScript Document

function controlevelden(aantal){
var fout = 0;
	for(var i = 0; i < aantal;i++)
	{
		var veld = document.getElementById('foutveld' + i);
		var veld2 = document.getElementById('foutmelding' + i);
			if(veld.value == ""){
			veld2.style.display = 'block'; 
			veld.style.borderColor = 'red';
			fout = fout + 1;
			}		
	}
	if(fout > 0){
		return false;}
}