function limitText(limitField, limitCount, limitNum) {
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}

function returnDisable() {
	if (document.getElementById('triptype').value == "Single") {
		document.forms['form1'].returntime.disabled=true;
	} else {
		document.forms['form1'].returntime.disabled=false;
	}
}

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 = externalLinks;