///////////////////////////////////////
// CHILD Birthday Checker              //
///////////////////////////////////////
// DESCRIPTION:                         //
// CHECK IF THE DECLARED CHILD DOB   //
// IS LESS THAN 12 YEARS OLD         //
///////////////////////////////////////
function checkChdBirthday(obj)
    {
    df = document.form;
    retdate = df.retdt.value; // Return Date of Journey in YYYYMMDD format
    if(document.form.nochd.value==1)
    {
        nochdvalue=document.form.nochd.value
    }
    else
    {
        nochdvalue=document.form.nochd.value-1
    }

    for (i=0; i<nochdvalue; i++) // loop through the number of children
    {
    number=number+1;
    if( !/^(\d{1,2})(\d{1,2})(\d{4})$/.test(obj.value) )
    {
        alert( "Invalid date supplied - must be format DDMMYYYY" );
        return;
    }

    // pass Infant DOB to check_date to check for invalid dates
    // e.g. 30022002
    check_date(obj); 

    var d = new Date();
    var d2 = new Date(RegExp.$3, RegExp.$2, RegExp.$1);
    nochd = document.form.nochd.value
    noinf = document.form.noinf.value

    var diff = d.getDiff(d2, "y")
    if( isNaN(diff) )
    {
        alert( "Invalid date supplied" );
    }
    else if( diff < 12 ) {
        //alert( "This IS an CHILD \n they are younger than 12" );
        child = true;
        submit_form=true;
        under12counter = under12counter + 1;
        passtocheckRetDate = obj.value;
        checkRetDate(document.form.retdt);

    }
    else if( diff > 12 ) {
        //alert( "This is NOT an CHILD\nthey are older than 12" );
        child = false;
        submit_form=false;
        chdcounter = chdcounter + 1; // amount of declared children that are found to be under 12
        childno = i+1

        forename = document.form.cfname1.value
        surname = document.form.clname1.value

        if(chdcounter==2)
        {
            if(document.form.cfname2.value!="")
            {
                forename2 = document.form.cfname2.value
                surname2 = document.form.clname2.value
            }
        }

        if(chdcounter==3)
        {
            if(document.form.cfname3.value!="")
            {
                forename3 = document.form.cfname3.value
                surname3 = document.form.clname3.value
            }
        }
        }
    }    
    inf_ok=false;    
}