function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}

function clearDefault(el) {
  if (el.defaultValue==el.value) el.value = ""
}
function checkForm(form) {
  var re = /^[\w ]+$/;
  var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
  var address = form.email.value;
  if((form.first.value == '') || (form.first.value == 'First Name')) { 
    alert("Error: You need to enter your first name!"); 
	form.first.focus();  
	return false;  
  } else if(!re.test(form.first.value)) { 
    alert("Error: Your first name contains invalid characters!"); 
	form.first.focus();
	return false;  
  } else if((form.last.value == '') || (form.last.value == 'Last Name')) { 
    alert("Error: You need to enter your last name!"); 
	form.last.focus();  
	return false;  
  }  else if(!re.test(form.last.value)) { 
    alert("Error: Your last name contains invalid characters!"); 
	form.last.focus();  
	return false;  
  } else if((form.email.value == '') || (form.email.value == 'Email')) {
    alert("Error: You need to enter your email address!");
	form.email.focus();
	return false;
  } else if(reg.test(address) == false) {
     alert("Error: You need to enter a valid email address!");
	 form.email.focus();
     return false;
  } else if((form.job.value == '') || (form.job.value == 'Job Description')) {
    alert("Error: You need to enter a job description!");
	form.job.focus();
	return false;
  }
  return true;  
}