function showPopUp (url, name, widgets) {
	popupWin = window.open(url,name,widgets);
	popupWin.opener.top.name = "opener";
	popupWin.focus();
}

function controleerFormulier (email, name, text) {
    if (email.length  == 0) 
		{window.alert ("Please fill out your email address"); return false;}
	else if ((email.indexOf ("@") == -1) || (email.indexOf (".") == -1) || (email.indexOf (" ") >= 0))
		{message="\""+email + "\"" +" is not a valid email address!"; window.alert (message); return false;
	}
    else if (name.length  == 0) 
		{window.alert ("Please fill out your name"); return false;}
    else if (text.length  == 0) 
		{window.alert ("Please tell us about your contribution"); return false;}
	else {document.comments.submit(); return true;}
}

function controleerSuggestFormulier (email, url, text) {
    if (url.length  == 0) 
		{window.alert ("Please fill out a URL for the site"); return false;}
	else if ((url.indexOf (".") == -1) || url.indexOf(" ")>=0) {
		{message="\""+url + "\"" +" is not a valid URL!"; window.alert (message); return false;}
	}
	else if (url.length<10)
		{window.alert ("Please give a valid url for this site"); return false;}
	else if (text.length<6)
		{window.alert ("Please enter the title of the site"); return false;}
    else if (email.length  == 0) 
		{window.alert ("Please fill out your email address"); return false;}
	else if ((email.indexOf ("@") == -1) || (email.indexOf (".") == -1) || (email.indexOf (" ") >= 0))
		{message="\""+email + "\"" +" is not a valid email address!"; window.alert (message); return false;
	}
	else {document.suggestLink.submit(); return true;}
}

function bldisplay(blockname,i) {
  if (document.getElementById){
	if (document.getElementById(blockname+i)) {
	  for ( j = 1; j < 1000; j++ ) {
		if (document.getElementById(blockname + j)) {document.getElementById(blockname + j).style.display = 'none';}
		else {j = 1000;}
	  }
	  if (i) {document.getElementById(blockname+i).style.display = 'block';}
	}
  }
}