Trouble with GUI Button Level switching.

Hi,

i wrote a simple script for a button that (when it gets clicked) changes the current Scene. Here is a part of it:

 void OnGUI()
     {
         //Display TitleScreen
         GUI.DrawTexture (new Rect (0, 0, Screen.width, Screen.height), TitleScreen);
     
         //Display Buttons
         if (GUI.Button (new Rect (Screen.width * .37f, Screen.height * .34f, Screen.width * .25f, Screen.height * .1f),"",Button1));
         {
             Application.LoadLevel(1);
         }

I tested it but if i start the game the level switches immediately. I didn't clicked it. If i start the game the scene just switches in the moment the GUI Button loaded. I don't know what is wrong there.