Question

below code try to make img be draggable(regarding this), it works but I can’t figure how to make if img move all wrap drag_wp move together. http://jsfiddle.net/cAeKG/8/ any suggestion?

js

function enableDraggin(el){
    var dragging = dragging || false, x, y, ox, oy, current;
    el.onmousedown = function(e){
        e.preventDefault();
        current = e.target;
        dragging = true;
        x = e.clientX;
        y = e.clientY;
        ox = current.offsetLeft;
        oy = current.offsetTop;
        window.onmousemove = function(e) {
            if (dragging == true) {
                var sx = e.clientX - x + ox,
                sy = e.clientY - y + oy;
                current.style.left = sx + "px";
                current.style.top = sy + "px";
                return false;
            }
        };
        window.onmouseup = function(e) {
            dragging && (dragging = false);
        };
    };
};
var el = $('.drag_wp');
for(var i = 0; i < el.length; i++){
    enableDragging(el[i]);
};

html & css

<div class="drag_wp">
    <img src="..." class="drag_el">
    <div></div>
    ....// other div
</div>
.drag_wp{
    position: absolute;
    width: auto;
    height: auto;
    background:red;
}
.drag_el{
    position: absolute;
    width: 200px;
    height: auto;
}

Answer 1

function enableDraggin(el){
    var dragging = dragging || false, x, y, ox, oy, current;
    el.onmousedown = function(e){
        e.preventDefault();
        current = e.target;
        //just add this
        if(!$(current).hasClass(".drag_wp"))
             current = $(current).closest(".drag_wp")[0];
        //just add this
        dragging = true;
        x = e.clientX;
        y = e.clientY;
        ox = current.offsetLeft;
        oy = current.offsetTop;
        window.onmousemove = function(e) {
            if (dragging == true) {
                var sx = e.clientX - x + ox,
                sy = e.clientY - y + oy;
                current.style.left = sx + "px";
                current.style.top = sy + "px";
                return false;
            }
        };
        window.onmouseup = function(e) {
            dragging && (dragging = false);
        };
    };
};

e.target returns element that was clicked (image in most cases for your HTML). If it has no class .drag_wp, just find closest parent with that class and use it as current.

Demo: http://jsfiddle.net/fTeXL/

Also, as you are already using jquery, you may find it better to use corresponding plugin from jQuery UI: http://jqueryui.com/draggable/