if (document.images) {
i2on = new Image();
i2on.src = "images/red.gif";
i2off = new Image();
i2off.src = "images/gray.gif";
}

/*/
/ / This function will change the src property of element
/ / to match the src property of the image in the DOM.
/ / Returns true or false depending on success.
/*/
function swapImg(element, image)
{
  // only if there are images defined in the DOM
  if (document.images)
  {
    eval("document." + element + ".src = \"" + image.src + "\";");
    return true;
  }
  else
    return false;
}



function checkform(form) {
	if (form.last_name.value==''){ alert('You must provide your last name'); return false; }
	else if(form.first_name.value==''){ alert('You must provide your first name'); return false; }
	else if(form.official_delegate.value==''){ alert('Please let us know if you are the official delegate for this conference'); return false; }
	else if(form.name_card.value==''){ alert('Please let us know the name you would like on your badge'); return false; }
	else if(form.address1.value==''){ alert('You must provide your address'); return false; }
	else if(form.company.value==''){ alert('You must provide your organization'); return false; }
	else if(form.title.value==''){ alert('You must provide your title'); return false; }
	else if(form.city.value==''){ alert('You must provide your city'); return false; }
	else if(form.state.value==''){ alert('You must provide your state'); return false; }
	else if(form.zip.value==''){ alert('You must provide your zip code'); return false; }
	else if(form.phone.value==''){ alert('You must provide at least one phone number'); return false; }
	else if(form.email.value==''){ alert('You must provide an email address'); return false; }
	else if(form.arrive_date.value==''){ alert('Please let us know what day you will arrive'); return false; }
	else if(form.depart_date.value==''){ alert('Please let us know what day you will depart'); return false; }
	else{ return true; }
}