function resizeImg(imgObj,imgSize){
  if(imgObj){
      //var imgid = imgObj.id;
      var imgwth = imgObj.width;
      var imghgt = imgObj.height;
      if(!imgSize||typeof(imgSize)!="number") imgSize=600;
      if(imgwth > imghgt){
          if(imgwth>imgSize){
            imgObj.style.width = imgSize;
            imgObj.style.height = imghgt * imgSize / imgwth;
          }else{
            imgObj.style.width = imgwth;
            imgObj.style.height = imghgt;
          }
      }else{
          if(imghgt>imgSize){
            imgObj.style.width = imgwth * imgSize / imghgt;
            imgObj.style.height = imgSize;
          }else{
            imgObj.style.width = imgwth;
            imgObj.style.height = imghgt;
          }
      }
  }
}