網頁縮放的一段代碼[原創]

var istep=0;
function zoomout(ReturnStep)
{
 istep+=ReturnStep;
 document.all.Form1.style.zoom=1+istep/100;
}
function zoomin(ReturnStep)
{
 istep-=ReturnStep;
 document.all.Form1.style.zoom=1+istep/100;
}
function zoomRev()
{
 istep=0;
 document.all.Form1.style.zoom=1;
}
function setZoom(ZoomRate)
{
 istep=ZoomRate-100;
 document.all.Form1.style.zoom=1+istep/100;
}