Iframe高度自动变化

 function  heightSet(thisFrame){  
       if($.browser.mozilla || $.browser.msie){  
           bodyHeight =window.frames["thisFrameName"].document.body.scrollHeight;  
       }else{  
           bodyHeight =thisFrame.contentWindow.document.documentElement.scrollHeight;  
       }  
       document.getElementById("thisFrameId").height=bodyHeight;    
 }