// JavaScript Document
function requiredfield(fld,fldname) {
    var error = "";
     if (fld.value.length == 0) {
        fld.style.background = background_error; 
		error = fldname + " has not been filled in.\n";
    } else {
        fld.style.background = background;
    }
    return error;  
}

function requireddropdownlist(fld,fldname) {
    var error = "";
     if (fld.value == "Please select") {
        fld.style.background = background_error; 
		error = fldname + " has not been selected.\n";
    } else {
        fld.style.background = background;
    }
    return error;   
}

function requiredradiofield(fld,fldname) {
    var error = "";
     if ( (fld[0].checked == false) && (fld[1].checked == false) ) {

        fld[0].style.background = background_radio_error;
        fld[1].style.background = background_radio_error;		 
		error = fldname  + " has not been selected.\n"; 
    } else {
        fld[0].style.background = background_radio;
        fld[1].style.background = background_radio;		
    }
    return error;  
}

function validateEmail(fld,fldname) {
    var error = "";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
        fld.style.background = background_error;
        error = fldname + " has not been entered.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = background_error;
        error = fldname + " is not a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = background_error;
        error = fldname + " contains illegal characters.\n";
    } else {
        fld.style.background = background_normal;
    }
	
    return error;
}

function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}

function showhideinterest(e)
{
	if (e.value == "Other (please specify)")
	{
			interest_other.style.display='block';
			interest_other1.style.display='block';
			document.getElementById('interest_in_flat_other_specify').focus();
}
	else
	{
			interest_other.style.display='none';		
			interest_other1.style.display='none';		
}
}