window.print()打印时，如何自定义页眉/页脚、页边距

try{
var hkey_root,hkey_path,hkey_key;
hkey_root="HKEY_CURRENT_USER"; hkey_path="\\Software\\Microsoft\\Internet Explorer\\PageSetup\\";
var RegWsh = new ActiveXObject("WScript.Shell");

//设置页眉/脚的字体样式
hkey_key="font";
RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"font-size: 12px; font-family: 黑体; line-height: 24px");

//设置页眉
hkey_key="header";
RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"打印编号");

//设置页脚
hkey_key="footer";
RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"&b第 &p 页/共 &P 页");

//设置页边距(0.6 要乘以 2.5为实际打印的尺寸)
hkey_key="margin_bottom";
RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"0.6");

hkey_key="margin_left";        RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"0.6");

hkey_key="margin_right";          RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"0.6");

hkey_key="margin_top";          RegWsh.RegWrite(hkey_root+hkey_path+hkey_key,"0.6");

window.print();
}catch(e){
alert(e.name+"  "+e.message);
}