function clrbox( objInput, valDefault ) { if(objInput.value==valDefault) { objInput.value=''; } }
 
 function isMail(email) { return email.search(/^[\.\w_'-]+@[\w_'-]+\.[\w_-]+(\.[\w_-]+)*$/)==-1 ? false : true; }
 
 function mailSubmit() {
  var mf=document.getElementById('mailform'); var de=0;	mf.comment.focus();
	if((de==0)&&(mf.name.value.length<4))     { de=1; alert('Please enter your Full Name'); mf.name.focus(); }
	if((de==0)&&(!isMail(mf.email.value)))    { de=2; alert('Please enter a valid Email Address'); mf.email.focus(); }
	if((de==0)&&(mf.comment.value.length<10)) { de=3; alert('Please enter a longer Message'); mf.comment.focus(); }
	if(de==0) { mf.submit(); }
 }

 function extLinks() {
  if(!document.getElementsByTagName) { return; }
  var links=document.getElementsByTagName('a');
  var lnk=''; var rel=''; var ext=/external/;
  for(l=0; l<links.length; l++) {
   lnk=links[l];
   rel=lnk.getAttribute('rel');
   if(ext.test(rel)) { lnk.target='_blank'; }
  }
 }