// validates that the field value string has one or more characters in it
function isNotEmpty(elem) {
        var str = elem.value;
        var re = /.+/;
        if(!str.match(re)) {
                alert("Please fill in the required field.");
                setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
                return false;
        } else {
                return true;
        }
}
//validates that the entry is a positive or negative number
function isNumber(elem) {
        var str = elem.value;
        var re = /^[-]?\d*\.?\d*$/;
        str = str.toString();
        if (!str.match(re)) {
                alert("Enter only numbers into the field.");
                setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
                return false;
        }
        return true;
}
// validates that the entry is 16 characters long
function isLen16(elem) {
        var str = elem.value;
        var re = /\b.{16}\b/;
        if (!str.match(re)) {
                alert("Entry does not contain the required 16 characters.");
                setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
                return false;
        } else {
                return true;
        }
}
// validates that the entry is formatted as an e-mail address
function isEMailAddr(elem) {
        var str = elem.value;
        var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
        if (!str.match(re)) {
                alert("Verify the e-mail address format.");
                setTimeout("focusElement('" + elem.form.name + "', '" + elem.name + "')", 0);
                return false;
        } else {
                return true;
        }
}
// validate that the user made a selection other than default
function isChosen(select) {
        if (select.selectedIndex == 0) {
                alert("Please make a choice from the list.");
                return false;
        } else {
                return true;
        }
}

// validate that the user has checked one of the radio buttons
function isValidRadio(radio) {
        var valid = false;
        for (var i = 0; i < radio.length; i++) {
                if (radio[i].checked) {
                        return true;
                }
        }
        alert("Make a choice from the radio buttons.");
        return false;
}

function focusElement(formName, elemName) {
        var elem = document.forms[formName].elements[elemName];
        elem.focus();
        elem.select();
}

function isPhone(string) {
        if (string.search(/^[0-9][0-9][0-9]\-[0-9][0-9][0-9]\-[0-9][0-9][0-9][0-9]$/) != -1){
                return true;
        }else{
                document.form2.phone1.focus()
                alert("You must supply a valid phone number.");
                return false;
        }
}

function checkf(form) {
        if (isNotEmpty(form.firstname)) {
                if (isNotEmpty(form.lastname)) {
                        if (isNotEmpty(form.email)) {
                                if (isEMailAddr(form.email)) {
                                        if (isPhone(form.phone1.value+'-'+form.phone2.value+'-'+form.phone3.value)) {

                                                return true;
                                        }
                                }
                        }
                }
        }
        return false;
}
try {document.execCommand("BackgroundImageCache", false, true);} catch(err) {}