Solution to showModalDialog returning Null in Google Chrome_javascript skills

The return value of showModalDialog can be obtained under IE and Firefox, but it will return Null under Google Chrome. The solution is introduced below

Parent page:

Copy code The code is as follows:

function openwindows(){
var obj = new Object();

// Open the modal subform and get the return value
var retval = window.showModalDialog("ordervideo.jsp?rderIds=" "0010,0020,0030",obj,"dialogWidth=500px;dialogHeight=500px");

//for chrome
if(retval == undefined) {
retval = window.returnValue;
}
alert(retval);
}

Subpage:

Copy code The code is as follows:

function onload() {

//for chrome
if(window.opener != undefined) { //The value of window.opener is not empty under Google Chrome, but is undefined under IE/Firefox. This determines whether it is Google Chrome
window.opener.returnValue = flag; //The method of assigning a return value under Google Chrome window.opener.close(); //This must be closed once, otherwise the following window will be executed .close() cannot close the pop-up window, because the pop-up window under Google Chrome is a new window
}

else {
window.returnValue=flag; //This assignment method is compatible with IE/ Firefox, but not Google Chrome
}
window.close();

}