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";
	}
}

function togglePraCaseNumber(e) {		
	if (($('TestResultSubmissionPra') && parseInt($('TestResultSubmissionPra').value) == 1) || 
			($('TestResultPra') && parseInt($('TestResultPra').value) == 1))
		$('pra_case_number_section').show();
	else
		$('pra_case_number_section').hide();	
}

document.observe("dom:loaded", function() {       
     externalLinks();
     if ($('TestResultSubmissionPra')) 
     		$('TestResultSubmissionPra').observe('change', togglePraCaseNumber);
     if ($('TestResultPra')) 
     		$('TestResultPra').observe('change', togglePraCaseNumber);		
    });