var checkedAttrImage = 'images/Ask_box_checked.jpg';
var notCheckedAttrImage = 'images/Ask_box_unchecked.jpg';

function updateCheckbox(img, hidId)
   {
    var hid = document.getElementById(hidId);
       if (img.src.indexOf(checkedAttrImage) > -1){
            hid.value = 0;
            img.src = notCheckedAttrImage;  
       }
       else {
            hid.value = 1;
            img.src = checkedAttrImage; 
       }
}

function validateEmail(ele) {
    if (!isValidEmail(ele.value)) {
        ele.focus(); 
        ele.value='Enter valid email';
        return false;
    }
}

function isValidEmail(val)
{
var objRegExp = '^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$';
if (val.search(objRegExp) > -1)
return true;
return false;
}

window.onload = function() {
    document.getElementById('mnu_img_ask').style.backgroundImage = "url(images/Mnu_ov_ask.gif)";
}