CSS "expression" looping

Idk wheather to post this in CSS or javascript.

Because this is about a advance CSS tag that exucutes javascript.

Anyway,

For this test I am doing I did
#divName{ width:expression(alert(1)); }

However, it kept on alerting 1 over and over again.

Is there a way to make the "expression( " CSS to run a javscript function without looping itself?

Idk wheather to post this in CSS or javascript.

Because this is about a advance CSS tag that exucutes javascript.

Anyway,

For this test I am doing I did
#divName{ width:expression(alert(1)); }

However, it kept on alerting 1 over and over again.

Is there a way to make the "expression( " CSS to run a javscript function without looping itself?

yea you are telling javascirpt to alert 1 so its alerting 1 try using this
#divName{ width:expression(void(alert(1))); }

you need to stop alert returning true or it will exspect a size for the width
or this might work aswell:

#divName{ width:expression(alert(1);return '0px';); }

isn't expressions work only in IE, I suggest you'll use JS and then you can loop easily using for loops, and while loops.