GUI button adjustments

hi to all…

am facing a rare problem,it is very silly to see…but try to help me !

i created 5 buttons . it is exactly visible when the browser ( chrome,opera,IE,Mozilla …etc) when browser zoom is 100 %.
but when i change the browser zoom (90%,80%,150%…etc),the gui buttons are not visible on the screen.

i want those GUI buttons always at a particular position,even if i change the browser zoom.

please help me !!!

Here is an example of making GUI elements relative to the screen size:

function OnGUI()
{
	var sW = Screen.width;
	var sH = Screen.height;

	GUI.Box (Rect (0,0,150,30), "Top Left Corner");
	GUI.Box (Rect (sW-150,0,150,30), "Top Right Corner");
	GUI.Box (Rect (sW-150,sH-30,150,30), "Bottom Right Corner");
	GUI.Box (Rect (0,sH-30,150,30), "Bottom Left Corner");
}

Hope it helps, be sure to ask if you still have issues.

thank you…almost it is working…