var dir;
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		pre_mm_Top_over = newImage(dir+"common/btn_Top.gif');
		pre_mn_Com_over = newImage(dir+'common/mn_Com-over.gif');
		pre_mn_Mes_over = newImage(dir+'common/mn_Mes-over.gif');
		pre_mn_Apu_over = newImage(dir+'common/mn_Apu-over.gif');
		pre_mn_Apu1_over = newImage(dir+'common/mn_Apu1-over.gif');
		pre_mn_Apu2_over = newImage(dir+'common/mn_Apu2-over.gif');
		pre_mn_Apu3_over = newImage(dir+'common/mn_Apu3-over.gif');
		pre_mn_Apu4_over = newImage(dir+'common/mn_Apu4-over.gif');
		pre_mn_Sys_over = newImage(dir+'common/mn_Sys-over.gif');
		pre_mn_Sys1_over = newImage(dir+'common/mn_Sys1-over.gif');
		pre_mn_Sys2_over = newImage(dir+'common/mn_Sys2-over.gif');
		pre_mn_Sys3_over = newImage(dir+'common/mn_Sys3-over.gif');
		pre_mn_Sys4_over = newImage(dir+'common/mn_Sys4-over.gif');
		pre_mn_Cnt_over = newImage(dir+'common/mn_Cnt-over.gif');
		preloadFlag = true;
	}
}