div block display conflicts with iframe_html/css_WEB-ITnose

<script> <br> window.onload=function(){ <br> var divObj=document.getElementById("rightDiv"); <br> divObj.style.width=parseInt(document.body.offsetWidth)/3; <br> divObj.style.height=document.body.offsetHeight; <br> var isOverDiv=false; <br> document.body.onmousemove=function(e){ <br> var e=e||window.event; <br> if(parseInt(divObj.style.width)>parseInt(document.body.offsetWidth)-parseInt(e.clientX)){ <br> isOverDiv=true; <br> divObj.style.display=''; <br> } <br> if(parseInt(divObj.style.width)<parseInt(document.body.offsetWidth)-parseInt(e.clientX)&&isOverDiv){ <br /> divObj.style.display='none'; <br /> }  <br /> } <br /> <br /> } <br /> </script>