var backg_error = "#FFB8B8";
var backg_ok = "#FFFFFF";

function check_empty(obj){
    var retest = /^\s*$/
    if (retest.test(obj.value) ) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}
function check_number(obj,numlen){
    var retest = /(^[0-9]*$)/
    if (numlen > 0) {
        var retest = new RegExp("(^[0-9]{"+numlen+"}$)");
    }
    if (!retest.test(obj.value) || (!obj.value.length)   ) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}
function check_email(obj){
    var retest = /^([A-Za-z0-9\.\-]+)@([A-Za-z0-9\.\-]+)\.[a-z]{2,3}$/
    if (!retest.test(obj.value)   ) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}

function check_day(obj){
    var retest = /(^[1-9]$)|(^[12][0-9]$)|(^3[01]$)/
    if (!retest.test(obj.value)) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}

function check_mon(obj){
    var retest = /(^[1-9]$)|(^[1][012]$)/
    if (!retest.test(obj.value)) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}

function check_yea(obj){
    var retest = /(^20[0-9][0-9]$)/
    if (!retest.test(obj.value)) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}

function check_combo(obj){
    if (obj.options[0].selected) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}

function check_empty_combo (obj) {
    if (obj.options.length < 1) {
        obj.style.background = backg_error;
        return false;
    } else {
        obj.style.background = backg_ok;
        return true;
    }
}

function check_custom(obj,regularex) {
    var retest = new RegExp(regularex);
    if (!retest.test(obj.value) || (!obj.value.length)   ) {
        obj.style.backgroundColor = backg_error;
        return false;
    } else {
        obj.style.backgroundColor = backg_ok;
        return true;
    }
}

function check_dateDDMMYYYY(objname){
    obj = document.getElementsByName(objname)[0];
    var retest = /^(0[1-9]|[12][0-9]|3[01])[.](0[1-9]|1[012])[.](19|20)[0-9][0-9]$/
    if (!retest.test(obj.value)) {
        obj.style.backgroundColor = backg_error;
        return false;
    } else {
        obj.style.backgroundColor = backg_ok;
        return true;
    }
}

function check_date(obj){
    var retest = /^[+*]*$/

    var elems = obj.value.split("/");

    result = (elems.length == 3); // should be three components

    if (result)
    {
        var month = parseInt(elems[1],10);
        var day = parseInt(elems[0],10);
        var year = parseInt(elems[2],10);
        result = !isNaN(month) && (month > 0) && (month < 13) &&
        !isNaN(day) && (day > 0) && (day < 32) &&
        !isNaN(year) && (elems[2].length == 4);
    }

    if (!result)
    {
        obj.style.background = backg_error;
        return false;

    } else {
        obj.style.background = backg_ok;
        return true;
    }
}


function check_two_same(obj1,obj2){
    if (obj1.value != obj2.value ) {
        obj1.style.background = backg_error;
        obj2.style.background = backg_error;
        return false;
    } else {
        obj1.style.background = backg_ok;
        obj2.style.background = backg_ok;
        return true;
    }
}

function check_two_same_inverse(obj1,obj2){
    if (obj1.value == obj2.value ) {
        obj1.style.background = backg_error;
        obj2.style.background = backg_error;
        return false;
    } else {
        obj1.style.background = backg_ok;
        obj2.style.background = backg_ok;
        return true;
    }
}

function setStatus(idi,ion) {
    var obj = document.getElementsByName(idi);
    obj = obj[0];

    if(ion=="active"){
        //document.images[idi].src=eval(ion+".src");
        //obj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=100)";
        obj.style.cursor= "pointer";
        obj.disabled = false;
        return true;

    }
    if(ion=="inactive"){
        //document.images[idi].src=eval(ion+".src");
        //obj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(opacity=50)";
        obj.style.cursor= "default";
        obj.disabled = true;
        return false;
    }
}