// Validation routines for the TAMHSC Whitepages 
//
// Author: Charlie S. Lindahl
// Date  : 8/29/2006
//
// These javascript routines are called from the main search
// page for the TAMHSC whitepaoges system. 
//

// validate_component: make sure the user has selected a compoennt
// from the drop-down combo box. 
//
// If a component has NOT been selected, a Javascript alert dialog
// is issued projmpting the user to select one.

function validate_component() {
        var theComponent = document.selectComponentForm.selectComponentforDepartment.value;
        //alert('validate_component, component=' + theComponent);
        if (theComponent == -1) {
                alert('Must select a component');
                return false;
        }
        return true;
}

//
// validate_names:
//
// The user can specify either a first name, a last name, and a
// particular component in the query. 
//
// The textual inputs must be alphabetic and/or have a single
// quote. Any other value(s) are inavlid (this helps prevent
// form-based cross-scripting attacks). 
//
// In addition (for efficiency) the user must enter a minimum
// of 2 characters in the search. 
//
function validate_names() {
        var theFirstName = document.selectNamesForm.FirstName.value;
        var theLastName  = document.selectNamesForm.LastName.value;
        var theComponent = document.selectNamesForm.selectComponentforName.value;
        //alert('validate_names - FirstName="' + theFirstName + '"' +
        //      ', LastName="' + theLastName + '"');
        //
        // Check for *any* inputs
        //
        if ((theFirstName.length == 0) && (theLastName.length == 0)) {
           alert('Must specify a name to search');
           return false;
        }

        //
        // Check first name pattern
        //
        if (theFirstName.length > 0) {
                // Must have at least 2 characters
                if (theFirstName.length < 2) {
                   alert('Must have at least two characters ' +
                        'in the first name');
                   return false;
                }
                // And only letters and a single quote
                if (!theFirstName.match(/^([a-z]|[A-Z]|\')+$/)) {
                   alert('Must only have letters and/or single quote in first name');
                   return false;
                }
        }

        if (theLastName.length > 0) {
                // Must have at least 2 characters
                if (theLastName.length < 2) {
                   alert('Must have at least two characters ' +
                        'in the last name');
                   return false;
                }
                // And only letters and a single quote
                if (!theLastName.match(/^([a-z]|[A-Z]|\')+$/)) {
                   alert('Must have letters and/or single quote in last name');
                   return false;
                }

        }
        return true;
}

// validate_department: make sure the user has selected a department
// from the select menu. 
//
// If a department has NOT been selected, a Javascript alert dialog
// is issued projmpting the user to select one.
function validate_department() {
		var theDepartment = document.DepartmentListForm.selectDepartment.value;
        //alert('validate_department, department=' + theDepartment);
        if (theDepartment == "") {
                alert('Must select a department');
                return false;
        }
        return true;
}

// validate_name: make sure the user has selected a name
// from the select menu. 
//
// If a name has NOT been selected, a Javascript alert dialog
// is issued projmpting the user to select one.
function validate_name() {
		var theName = document.NameListForm.selectName.value;
        //alert('validate_department, department=' + theDepartment);
        if (theName == "") {
                alert('Must select a name');
                return false;
        }
        return true;
}