function check(dd,mystr1,mystr2)
{
var imgwidth;
var imgheight;
imgwidth=mystr1;
imgheight=mystr2;
 if (dd.width>imgwidth && dd.height>imgheight){
    if (dd.width/dd.height>imgwidth/imgheight){
     dd.width=imgwidth;
     }
   else
   {
   dd.height=imgheight
   }
   }
  else if(dd.width>imgwidth){
   dd.width=imgwidth
  }
  else if(dd.height>imgheight){
  dd.height=imgheight
  }
}

function getdatestr()
{
	var d,s = "";
	d = new Date();
	s += (d.getFullYear())+"年"
	s += (d.getMonth() + 1)+"月";
	s += (d.getDate())+"日";
	var x = new Array("星期日", "星期一", "星期二","星期三","星期四", "星期五","星期六");
	s +=" "+x[d.getDay()];
	return s;

}