function chkForm(form)
{
var chkReq = new Array ("name","address","comment","code");
var chkReqNames = new Array ("Name", "Address", "Comments","Image Code");
for (i=0;i< chkReq.length; i++)
{
var chkThis = chkReq[i];
if (form[chkThis].value == "") {
alert("The " + chkReqNames[i] + " form field is required.");
form[chkThis].focus();
return false;
}
}


};