js ideas and operations for obtaining computer resolution_javascript skills

When making a page, the user requires different resolutions and different positions of the pop-up window. I wonder if I should first obtain the screen width, then pay the value to the variable, and then set the parameters in onclick

Copy code The code is as follows:

<script> <BR>alert(screen.width "*" screen.height) <BR> </script>

Copy code The code is as follows:

< ;script>
function centerWindow(url,w,h){
l=(screen.width-w)/2
t=(screen.height-h)/2
window.open (url,'','left=' l ',top=' t ',width=' w ',height=' h)
}


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This code displays different pages according to different screens

The following is how to pass this parameter

Copy the code The code is as follows: