function showImg(elA) {
	elImg = document.getElementById("bindImg");
	elImg.src=elA.href;
	elNumbers = elA.parentNode;
	for (i=0; i < elNumbers.childNodes.length; i++) {
		if(elNumbers.childNodes[i].nodeType == 1) {
			elNumbers.childNodes[i].style.color = "#666666";
			elNumbers.childNodes[i].style.fontWeight = "normal";
		}
	}
	elA.style.color = "#ff0000";
	elA.style.fontWeight = "bold";
	return false;
}



function isEmailAddr(email) {
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0) {
	var pindex = theStr.indexOf(".",index);
	if ((pindex > index+1) && (theStr.length > pindex+1))
		result = true;
  }
  return result;
}

function validateForm(elForm) {
	if(elForm.elfirstname.value == "") {
	  alert("Please enter your first name");
	  elForm.elfirstname.focus();
	  return false;
	}
	if(elForm.ellastname.value == "") {
	  alert("Please enter your last name");
	  elForm.ellastname.focus();
	  return false;
	}		
	if(elForm.email.value == "" || !isEmailAddr(elForm.email.value)) {
	  alert("Please enter a valid email");
	  elForm.email.focus();
	  return false;
	}
	return true;
}