function ChangeImg() {
  if(document.images) {
   eval("document."+ChangeImg.arguments[0]+
   ".src=('"+ChangeImg.arguments[1]+"')");
  }
}

function preload() {
  if (document.images) {
    var imgsrc = preload.arguments;
    arr=new Array(imgsrc.length);
    for (var j=0; j<imgsrc.length; j++) {
      arr[j] = new Image;
      arr[j].src = imgsrc[j];
    }
  }
}

menu_status = new Array(); 

function showHide(theid)
{
    if (document.getElementById)
	 {
    var switch_id = document.getElementById(theid);

        if(menu_status[theid] != 'show')
		{
           switch_id.className = 'show';
           menu_status[theid] = 'show';
        }
		else
		{
           switch_id.className = 'hide';
           menu_status[theid] = 'hide';
		   window.location="index.php";

        }
    }
}