動态加載圖檔

loadImg: function(prop){

var img=$(this).get(0);

var url=prop.url||'';

var before=prop.before||function(){};

var callback=prop.callback||function(){};

if(url=='') {

return;

}

if("function"==typeof before) {

before(img);

}

//return;

if(img.readyState){ //IE support

img.onreadystatechange=function(){

if(img.readyState=="loaded" || img.readyState=="complete"){

if("function"==typeof callback) {

callback(img);

img.onreadystatechange=null;

}

}

}

}else{ //FF, safari, chrome, and others

img["onload"]=function(){

if("function"==typeof callback) {

callback(img);

img["onload"]=null;

}

}

}

img.src=url;

},