/* 此程式為 網頁設計排困解難 DIY (程秉輝 John Hawke 合著) 範例程式,詳細使用說明請見該書 */
var fh_o=1;   // 透明變化方向旗標
var opacityMax,opacityMin,opacityNum,fshtime;

function init(objs,opacitya,opacityi,opacityn,ftime)
{
 objfsh=objs;
 opacityMax=opacitya; opacityMin=opacityi; fshtime=ftime; opacityNum=opacityn;
 setInterval("opacity_flash(objfsh)",fshtime);
}

function opacity_flash(picobj)
{
 if (picobj.filters.alpha.opacity >= opacityMax) {picobj.filters.alpha.opacity-=5; fh_o=0;}
 else {if (picobj.filters.alpha.opacity <= opacityMin) {picobj.filters.alpha.opacity+=5; fh_o=1;}
       if (fh_o == 0) picobj.filters.alpha.opacity-=opacityNum;
       if (fh_o == 1) picobj.filters.alpha.opacity+=opacityNum;
      }	
}