Javascript error in every page on IE 10

I had a similar issue; resolved after following the solution posted here by nileshsaikhede http://forums.asp.net/t/1884400.aspx/1

All I had to do was add

<meta http-equiv="X-UA-Compatible" content="IE=7" />

to my master page.

Just to add to mafu josh's answer, the bound prototype can also be the issue.

Here's the code for that

Sys.UI.Bounds = function Sys$UI$Bounds(x, y, width, height) {
    x = Math.round(x);
    y = Math.round(y);

    var e = Function._validateParams(arguments, [
        { name: "x", type: Number, integer: true },
        { name: "y", type: Number, integer: true },
        { name: "width", type: Number, integer: true },
        { name: "height", type: Number, integer: true }
    ]);
    if (e) throw e;
    this.x = x;
    this.y = y;
    this.height = height;
    this.width = width;
}

I found a nice solution blogged by Yuriy:

<script language="javascript">
    Sys.UI.Point = function Sys$UI$Point(x, y) {

        x = Math.round(x);
        y = Math.round(y);

        var e = Function._validateParams(arguments, [
            {name: "x", type: Number, integer: true},
            {name: "y", type: Number, integer: true}
        ]);
        if (e) throw e;
        this.x = x;
        this.y = y;
    }
</script>

Paste this on your page to override the Sys$UI$Point function to round the numbers.

Or, set <compilation debug="false">

Either of these worked for me.

The answer is in the following link:

http://support.microsoft.com/kb/936993

I had to change Microsoft.Ajax.js.