if(navigator.appVersion.charAt(0)>=3){
      tmpimg=new Array()
      tmpimg[0] = new Image();tmpimg[0].src='./img/head_menu0.gif';
      tmpimg[1] = new Image();tmpimg[1].src='./img/head_menu0m.gif';
      tmpimg[2] = new Image();tmpimg[2].src='./img/head_menu1.gif';
      tmpimg[3] = new Image();tmpimg[3].src='./img/head_menu1m.gif';
      tmpimg[4] = new Image();tmpimg[4].src='./img/head_menu2.gif';
      tmpimg[5] = new Image();tmpimg[5].src='./img/head_menu2m.gif';
      tmpimg[6] = new Image();tmpimg[6].src='./img/head_menu3.gif';
      tmpimg[7] = new Image();tmpimg[7].src='./img/head_menu3m.gif';
      tmpimg[8] = new Image();tmpimg[8].src='./img/head_menu4.gif';
      tmpimg[9] = new Image();tmpimg[9].src='./img/head_menu4m.gif';
      tmpimg[10] = new Image();tmpimg[10].src='./img/head_contact.gif';
      tmpimg[11] = new Image();tmpimg[11].src='./img/head_contactm.gif';
    }

    function changimg(dim,count){
      if(navigator.appVersion.charAt(0)>=3){
          document.images[dim].src = tmpimg[count].src;
      }
    }