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];}
}

<!-- FORM VALIDATION -->

/************************************************
 bool ValidateEmail(string input)
 Return true or false
 if the email is valid or not.
 checks for @ and .
**************************************************/
function ValidateEmail(theinput){
 var s=theinput;
 if(s.search)
  return (s.search(new RegExp("^([-!#$%&'*+./0-9=?A-Z^_`a-z{|}~])+@([-!#$%&'*+/0-9=?A-Z^_`a-z{|}~]+\\.)+[a-zA-Z]{2,4}$","gi"))>=0);
 if(s.indexOf)
 {
  at_character=s.indexOf('@');
  if(at_character<=0 || at_character+4>s.length)
   return false;
 }
 if(s.length<6)
  return false;
 else
  return true;
}
 
/************************************************
 bool ValidateName(string input)
 Return true or false
 if the email is valid or not.
**************************************************/
function ValidateName(theinput){
 var s=theinput;
 if(s.search)
  return (s.search(new RegExp("^[^&'^`]+$","gi"))>=0);
 if(s.length<3)
  return false;
 else
  return true;
}
 
/************************************************
 bool ValidatePhone(string input)
 Return true or false
 if the phone number is valid or not.
 acepts - and + symbols
**************************************************/
function ValidatePhone(theinput){
 var s=theinput;
 if(s.search)
  return (s.search(new RegExp("[-+0-9]+","gi"))>=0);
 if(s.length<5)
  return false;
 else
  return true;
}
 

function CheckContactusForm(){
	var error="";

	if(!ValidateName(document.frmContactus.fname.value))
		error+="First Name\n";
			if(!ValidateName(document.frmContactus.lname.value))
		error+="Last Name\n";

		
	if(document.frmContactus.address1.value=="")
		error+="Address\n";
		
	if(!ValidatePhone(document.frmContactus.phone.value))
		error+="Phone\n";
		
	if(!ValidateEmail(document.frmContactus.email.value))
		error+="Email\n";
	
		
	if(document.frmContactus.comment.value=="")
		error+="Comments\n";
	
	if(error!="")
		alert("Error! Please check:\n"+error);
	else
		document.frmContactus.submit();
	
	return;
}


<!-- END FORM VALIDATION -->