function validate_required(field)
{
    var fVal = field.value;
    if(field.options != null)
        fVal = field.options[field.selectedIndex].text
    with (field)
    {
        if (fVal==null||fVal=="")
        {
            alert(field.name + " must be filled out!");
            field.focus();
            return false;
        }
        else if(fVal.toLowerCase() == "please select")
        {
            alert("You must select a value for " + field.name + "!");
            field.focus();
            return false;
        }
        else
            return true;
    }
}

function validate_form(thisform)
{
    with (thisform)
    {
        if (validate_required(email,"Email must be filled out!")==false)
        {
            email.focus();
            return false;
        }
    }
}

function echeck(str) {

    var at="@";
    var dot=".";
    var lat=str.indexOf(at);
    var lstr=str.length;
    var ldot=str.indexOf(dot);
    if (str.indexOf(at)==-1){
        alert("Invalid E-mail ID");
        return false;
    }

    if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
        alert("Invalid E-mail ID");
        return false;
    }

    if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
        alert("Invalid E-mail ID");
        return false;
    }

    if (str.indexOf(at,(lat+1))!=-1){
        alert("Invalid E-mail ID");
        return false;
    }

    if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
        alert("Invalid E-mail ID");
        return false;
    }

    if (str.indexOf(dot,(lat+2))==-1){
        alert("Invalid E-mail ID");
        return false;
    }

    if (str.indexOf(" ")!=-1){
        alert("Invalid E-mail ID");
        return false;
    }

    return true;				
}