function resizeIFrame() {
  
   if(document.all&&!window.opera) {

     var a=document.all.getshirts_iframe;
     getshirts_iframe.document.body.scroll='no';
   } else {
     var a=document.getElementsByName('getshirts_iframe')[0];
     a.scrolling='no';
   }
   var a=document.getElementsByName('getshirts_iframe')[0];
   getshirts_iframe.document.getElementsByTagName('body')[0].style.overflow='hidden';
   var b=getshirts_iframe.document.getElementById('page_margins');
   if(a.style.height != eval(b.offsetHeight+35)+'px') {
      a.style.height=eval(b.offsetHeight+35)+'px';
   }
}