showModalDialog弹层

function bullet(){

var str='dialogLeft:' + (screen.availWidth - 500)/2+'px;dialogTop:' + (screen.availHeight - 650)/2+'px;dialogWidth:500px;dialogHeight:592px;scroll:no;help:no;';

var url='link_man.link_man.do?m=edit1'; 
window.showModalDialog(url, window, str); 

alert("修改成功");

}