取消图片的默认事件

//取消图片的默认行为
$(function(){
var $img = $("img");
var moving = function(event){
//something
}

var img = document.getElementsByTagName('img');
//IE下需要在document的mousemove里面取消默认事件;要用原生JS的事件不能用JQuery
for (var i = 0; i < img.length; i++) {
img[i].onmousemove = function(e){
var ev = e || event;
ev.cancelBubble=true;
ev.returnValue = false;
};
}

$img.mousedown(function(event){
//FF下需要在mousedown取消默认操作;
event.preventDefault();
event.stopPropagation();
$(this).bind("mousemove",moving);
})
})