pName = new Array("../imgs-common/gnavi.jpg","../imgs-common/gnavi_bg.jpg","../introduction/imgs/stit_pur_h.jpg","../introduction/imgs/stit_fea_h.jpg","../introduction/imgs/stit_out_h.jpg","../introduction/imgs/stit_sys_h.jpg");
preImgs = new Array();
for (i=0; i<pName.length; i++){
	preImgs[i] = new Image();
	preImgs[i].src = pName[i];
	}