function isEmail(elm) {
  if (elm.value.indexOf("@") != "-1" && elm.value.indexOf(".") != "-1" || elm.value == "")
    return true;
    else return false; 
    }
    
    function isFilled(elm) {
    if (elm.value == "" || elm.value == null)
    return false;
    else return true;
    }
    

function isReady(vidform) {

if (isFilled(vidform.Name) == false) {
        alert("Please enter your Name.");
        vidform.Name.focus();
        return false;
        }

        if (isEmail(vidform.Email) == false) {
        alert ("Please enter a valid email address.");
        vidform.Email.focus();
        return false;
        }


  //  PULL-DOWN MENU VALIDATION
  
   	InstChoice = document.vidform.Inst.selectedIndex

   		if (document.vidform.Inst[InstChoice].value == "") {

		alert("Please select your institution.");
	return false;
}     

    
   if (isFilled(vidform.Addr1) == false) {
        alert("Please enter your  mailing address.");
        vidform.Addr1.focus();
        return false;
        }   
                         
if (isFilled(vidform.City) == false) {
        alert("Please enter your city.");
        vidform.City.focus();
        return false;
        }

if (isFilled(vidform.Zip) == false) {
        alert("Please enter your zip code.");
        vidform.Zip.focus();
        return false;
        }

 return true;
}


//Check the select form
function validate(form)
{
var ok = true;
var count = 0;
var vidselected = document.getElementsByName ("video[]");

for (var x = 0; x < vidselected.length;  x++) {
	if (vidselected[x].checked) {
		count++;
	}
}

if (count > 3) {
	alert("You selected " + count + " videos. \nYou may only request 3 videos at a time.");
	ok = false;
} else if (count < 1) {
	alert("Please select at least one video to continue.");
	ok = false;
}

return ok;
}