var dimages=new Array();
var numImages=7;
for (i=0; i<numImages; i++)
{
  dimages[i]=new Image();
  dimages[i].src="images/image"+(i)+".jpg";
}

var curImage=-1;
 
function swapPicture()
{
  if (document.images)
  {
    var nextImage=curImage+1;
    if (nextImage>=numImages)
      nextImage=0;
    if (dimages[nextImage] && dimages[nextImage].complete)
    {
      var target=0;
      if (document.images.myImage)
        target=document.images.myImage;
      if (document.all && document.getElementById("myImage"))
        target=document.getElementById("myImage");
 
        // make sure target is valid
       if (target)
       {
        document.myImage.src=dimages[nextImage].src;
        curImage=nextImage;
      }
      setTimeout("swapPicture()", 5000);
    }
    else
    {
      setTimeout("swapPicture()", 500);
    }
  }
}
setTimeout("swapPicture()", 5000);

function validation()
{
    
    if(document.frmContact.cus_name.value.search(/\S/) == -1)
    {
        document.frmContact.cus_name.value='';
        document.frmContact.cus_name.focus();
        document.getElementById('lblErr').innerHTML ='Please enter your name';
        return false;
    }
    if (! isValidEmail(document.frmContact.cus_email.value)) {
        document.getElementById('lblErr').innerHTML ='Please enter a valid email address';
        document.frmContact.cus_email.value='';
        document.frmContact.cus_email.focus();
        return false;
    }
    if(document.frmContact.cus_sub.value.search(/\S/) == -1)
    {
        document.getElementById('lblErr').innerHTML ='Please enter message subject';
        document.frmContact.cus_sub.value='';
        document.frmContact.cus_sub.focus()
        return false;
    }
    if(document.frmContact.cus_message.value.search(/\S/) == -1)
    {
        document.getElementById('lblErr').innerHTML ='Please enter your message';
        document.frmContact.cus_message.value='';
        document.frmContact.cus_message.focus()
        return false;
    }
    return true;
}

function isValidEmail(email, required) {
    if (required==undefined) {   // if not specified, assume it's required
        required=true;
    }
    if (email==null) {
        if (required) {
            return false;
        }
        return true;
    }
    if (email.length==0) {  
        if (required) {
            return false;
        }
        return true;
    }
    if (! allValidChars(email)) {  // check to make sure all characters are valid
        return false;
    }
    if (email.indexOf("@") < 1) { //  must contain @, and it must not be the first character
        return false;
    } else if (email.lastIndexOf(".") <= email.indexOf("@")) {  // last dot must be after the @
        return false;
    } else if (email.indexOf("@") == email.length) {  // @ must not be the last character
        return false;
    } else if (email.indexOf("..") >=0) { // two periods in a row is not valid
    return false;
    } else if (email.indexOf(".") == email.length) {  // . must not be the last character
    return false;
    }
    return true;
}

function allValidChars(email) {
  var parsed = true;
  var validchars = "abcdefghijklmnopqrstuvwxyz0123456789@.-_";
  for (var i=0; i < email.length; i++) {
    var letter = email.charAt(i).toLowerCase();
    if (validchars.indexOf(letter) != -1)
      continue;
    parsed = false;
    break;
  }
  return parsed;
}