//a.html
function onclick()
{
var v = window.showModalDialog("b.html",window,"dialogWidth:500px;dialogHeight:500px;");
}
function onclick()
{
var v = window.showModalDialog("b.html",window,"dialogWidth:500px;dialogHeight:500px;");
}
http://topic.csdn.net/u/20090811/23/a0812cf7-4989-408b-b73c-ad6faf458369.html