/**
 * @copyright JDesign
 * @author Knishman Eduard
 */

 function validateEmail(elm_value) {
    if (typeof elm_value != "string") return true;
    if (elm_value.blank()) return true; 
    var ar = elm_value.split('@');
    if (ar.length != 2) {
        return false;
    }
    var p = /[^a-zA-Z0-9.!#$%&'*\/=?^_`{|}~+-]/; //allowed chars in local part
    if (ar[0].length == 0) { return false;}
    if (ar[0].match(/^\./)!=null || ar[0].match(/\.$/)!=null) { return false;}
    if (ar[0].match(/\.\./)!=null) { return false;}
    if (ar[0].match(p) != null)  { return false;}   
    if (ar[1].match(/[^a-zA-Z0-9._-]/) != null) { return false;}
    return true;
 }