function isblank(s) { return s.search(/\S/)==-1?true:false; }

var MSG='____________________________________________________________'+
		"\n\nThe form was not submitted because of the following error(s)"+
		"\nPlease correct error(s) and re-submit."+
		"\n____________________________________________________________\n";

var emptyFields=new Array();
var errors=new Array();

function alertMsg()
{
	var msg=MSG;

	if(emptyFields.length)
		msg+="\n- The following required field(s) are empty:\n"+emptyFields.join("\n    ");

	if(emptyFields.length && errors.length)
		msg+="\n\n";

	if(errors.length)
		msg+='- '+errors.join("\n- ");

	emptyFields.length=0;
	errors.length=0;
	alert(msg);
}

function verifyItem(f)
{
	if(isblank(f.size.value))
		errors[errors.length]='A size must be selected';

	if(!emptyFields.length && !errors.length)
		return true;
	else
	{
		alertMsg();
		return false;
	}
}