var aryRequired = new Array();
    var intArrayCount = 0;
    
    function defineRequired(strElementName, strDisplayMessage, blnIsEmail, blnIsNumber)
    {
        var objRequired = new Object();
        objRequired.ElementName = strElementName;
        objRequired.DisplayMessage = strDisplayMessage;
        objRequired.IsEmail = blnIsEmail;
        objRequired.IsNumber = blnIsNumber;
        aryRequired[intArrayCount] = objRequired;
        intArrayCount++;
    }
    
    function checkForm(objForm)
    {
        //web tv bug fix
        if (navigator.userAgent.indexOf("WebTV") == -1) {
          for (var i = 0; i < aryRequired.length; i++) {
            var blnFail = true; 
            var objElement = eval("objForm." + aryRequired[i].ElementName);
           
            if (objElement.length && !objElement.type && document.images) {
              //looping through element array
              for (var x = 0; x < objElement.length; x++) {
                if (objElement[x].checked && objElement[x].value != "") blnFail = false;
              } 
            } 
            else {
              if (objElement.value != "") {
                if (aryRequired[i].IsEmail) { if (CheckEmail(objElement.value)) blnFail = false; }
                else if (aryRequired[i].IsNumber) { if (!isNaN(objElement.value)) blnFail = false; }
                else blnFail = false;
              }
            }
            if (blnFail) {  
              alert(aryRequired[i].DisplayMessage);
              if (objElement.length && !objElement.type) objElement[0].focus();
              else objElement.focus();
              return false;
            } 
          }
        // all elements passed, submit form
        }
        return true;
    }
    
    function CheckEmail(strData) 
    {
        var posAt = strData.indexOf("@")
        var strName = strData.substring(0, posAt)
        var strDomain = strData.substring(posAt+1, strData.length)
        var posDot = strDomain.indexOf(".")
        var strSubDomain = strDomain.substring(posDot+1,strDomain.length)
        
        if ( strName=="" || strDomain=="" || posDot < 1 || strSubDomain =="") return false;
        else return true;
    }

    // Change these to the inputs you want required
    defineRequired("Name","Name is a required field. Please fill it in.");
    defineRequired("Email","Invalid Email address, Please enter a vaild email address.", true);
    defineRequired("Query","Query is a required field. Please fill it in.");