function clearText(field)
{
 if (field.defaultValue == field.value) field.value = '';
 else if (field.value == '') field.value = field.defaultValue;
} 

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("class") == "external-link-new-window")
   anchor.target = "_blank";
 }
}
window.onload = externalLinks;