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.target = "_blank";
 }
}

window.onload = function() {
	externalLinks();
}

function MM_jumpMenu(targ,selObj,restore) {
	eval(targ+".location='"+selObj.options[selObj.selectedIndex].value+"'");
	if (restore) selObj.selectedIndex=0;
}

function toggle(id) {
	if (obj = document.getElementById(id)) {
		obj.style.display = ( (obj.style.display == 'block') ? 'none' : 'block');
	}
}

function restrictChars(myfield, e) {
	var key;
	var keychar;
	
	if (window.event)
		key = window.event.keyCode;
	else if (e)
		key = e.which;
	else
		return true;

	keychar = String.fromCharCode(key);

	// control keys
	if ((key==null) || (key==0) || (key==8) ||
		(key==9) || (key==13) || (key==27) )
		return true;

	// numbers + alphabetic chars
	else if ((("0123456789").indexOf(keychar) > -1))
		return true;
	else
		return false;
}