Print and Preview

function print(preview)
     {
        var content=window.document.body.innerHTML;
        var oricontent=content;
        while(content.indexOf("{$printhide}")>=0) content=content.replace("{$printhide}","style='display:none'");
        if(content.indexOf("ID=/"PrintControl/"")<0) content=content+"<OBJECT ID=/"PrintControl/" WIDTH=0 HEIGHT=0 CLASSID=/"CLSID:8856F961-340A-11D0-A96B-00C04FD705A2/"></OBJECT>";
        window.document.body.innerHTML=content;
        //PrintControl.ExecWB(7,1)preview，(1,1)open，(4,1)save，(17,1)select all，(10,1)property，(6,1)print，(6,6)print directly，(8,1)page setting 
        if(preview==null)
        {
         PrintControl.ExecWB(4,1);
        }
        else
        {
       
        }
        if(preview==false)
        {
       
         PrintControl.ExecWB(6,1);
        }
        else
        {
        PrintControl.ExecWB(7,1); //OLECMDID_PRINT=7; OLECMDEXECOPT_DONTPROMPTUSER=6/OLECMDEXECOPT_PROMPTUSER=1
        }
        window.document.body.innerHTML=oricontent;
     }