var getJSONP = function ( url, callback ) {
if( !url ) {
return ;
}
var cbnum = 'cb' + JSONP.counter++;
var cbname = 'JSONP.' + cbnum;
if( url.indexOf('?') === -1) {
url += '?jsonp=' + cbname;
}else{
url += '&jsonp=' + cbname;
}
JSONP[cbnum]= function ( res ) {
try {
callback( res );
}catch( e ) {
//
}finally{
delete getJSONP[cbnum];
oScript.parentNode.removeChild(oScript);
}
};
var oScript = document.createElement('script');
oScript.src = url;
document.getElementsByTagName('head')[0].appendChild(oScript);
};
//调用
JSONP.counter = 0;
getJSONP('http://i.cnblogs.com/EditPosts.aspx?opt=1', function () {});