function preload() {
 var img01 = new Image();
 var img02 = new Image();
 var img03 = new Image();
 var img04 = new Image();
 var img05 = new Image();
 var img06 = new Image();
 var img07 = new Image();
 var img08 = new Image();
 var img09 = new Image();
 var img10 = new Image();
 var img11 = new Image();
 var img12 = new Image();
 var img13 = new Image();
 img01.src = "../img/share/menu_1_f2.gif";
 img02.src = "../img/share/menu_2_f2.gif"; 
 img03.src = "../img/share/menu_3_f2.gif";
 img04.src = "../img/share/menu_4_f2.gif"; 
 img05.src = "../img/share/menu_5_f2.gif";
 img06.src = "../img/share/menu_6_f2.gif"; 
 img07.src = "../img/share/menu_7_f2.gif";
 img08.src = "../img/share/menu_8_f2.gif"; 
 img09.src = "../img/share/menu4_1_f2.jpg";
 img10.src = "../img/share/menu4_2_f2.jpg"; 
 img11.src = "../img/share/menu4_3_f2.jpg";
 img12.src = "../img/share/menu4_4_f2.jpg"; 
 img13.src = "../img/share/party_f2.gif";
 }