i had a javascript to detect user broswer width and want to pass the width to aspx.vb. 

```
function chk_width() {
 var winW = document.body.offsetWidth;
 document.getElementById("hiddenfieldsize").value = winW;
// alert(winW);
} 

<body onLoad="chk_width()">

```

i had tried to use the following code, but i cannot get the value.

```
Dim WinWdth As String = Request.Form("hiddenfieldsize").ToString

```

Joe