function preLoadImg(){
arrImgList=new Array(

"/user_data/packages/uassist/images/side/btn_login_on.gif",
"/user_data/packages/uassist/images/side/btn_entry_on.gif",
"/user_data/packages/uassist/images/side/banner_side_on.gif",
"/user_data/packages/uassist/images/side/btn_cartin_on.gif",
"/user_data/packages/uassist/images/side/btn_search_on.gif",

"/user_data/packages/uassist/images/detail/b_cartin_on.gif",

"/user_data/packages/uassist/img/shopping/b_select_on.gif",
"/user_data/packages/uassist/img/shopping/b_ordercomp_on.gif",
"/user_data/packages/uassist/img/common/b_back_on.gif",
"/user_data/packages/uassist/img/common/b_next_on.gif",
"/user_data/packages/uassist/img/common/newadress_on.gif",
"/user_data/packages/uassist/img/common/b_toppage_on.gif",
"/user_data/packages/uassist/img/cart/b_pageback_on.gif",
"/user_data/packages/uassist/img/cart/b_buystep_on.gif",

"/user_data/packages/uassist/img/header/logout.gif"
);
arrPreLoad=new Array();
for(i in arrImgList){
 arrPreLoad[i]=new Image();
 arrPreLoad[i].src=arrImgList[i];
}
}
function chgImg(fileName,imgName){document.images[imgName].src=fileName;}
function chgImgImageSubmit(fileName,imgObj){imgObj.src=fileName;}
function naviStyleChange(ids,bcColor,color){
document.getElementById(ids).style.backgroundColor=bcColor;
}