设置Javascript中剩余的绝对位置不起作用

Question

I am trying to set my gridview (asp.net) position to absolute when the gridview stretches further than the standard 960 pixels.

However I have run across the issue where left: 0 has the effect I desire, however anything other than that does nothing.

Here is my code. The section where it's less than the screen doesnt work because i am trying to center it to the screen. However as it's greater than 0 the absolute position of Left: x doesn't work. Any help would be appreciated!

 var gridview = document.getElementsByTagName("table");
            var fieldset = document.getElementsByTagName("fieldset");
            fieldset[0].style.position = "relative";
            for (var i = 0; i < gridview.length; i++) {
                var width = gridview[i].offsetWidth;
                var screenWidth = window.screen.width - 2;

                if (width > 940) {
                    gridview[i].style.position = "absolute";
                    if (width > screenWidth) {
                        gridview[i].style.left = 0;
                        alert('> screen');
                    }
                    else {
                        gridview[i].style.left = 50;
                        alert('< screen');
                    }
                }
            }

EDIT: The fix was to concat 'px' after the value

Answer 1

Not really go enough to go on, but it might be the case that the container of gridview hasn't had its position set your css.

To use the postion:absolute the above container should be set to position:relative or it just wont render the css.

Also try adding px to the end of your size, setting the css to left:XXpx; rather than just a number.