下面javaScript代码为什么在火狐不能执行啊？帮忙看看。

Question

function movepic(img_name,img_src) {
document[img_name].src=img_src;
}
function scall(){
  var ieheight=document.documentElement.clientHeight;
  var idwidth = document.documentElement.clientWidth;
if(ieheight>=483){
document.getElementById("footer").style.top=
   document.documentElement.scrollTop+ieheight-document.getElementById("footer").offsetHeight;
   if(idwidth<=700){
     document.getElementById("conzj").style.top= document.documentElement.scrollTop+(document.documentElement.clientHeight-document.getElementById("conzj").offsetHeight)/2
 document.getElementById("conzj").style.left=20;
 document.getElementById("tab_1sf").style.width = 680;
     document.getElementById("tab_wsf").style.width = 680;
 document.getElementById("tab_2sf").style.width = 680;
 document.getElementById("tab_jy_1").style.width = 680;
 document.getElementById("tab_jy_2").style.width = 680;  
   }else
   {
   document.getElementById("tab_1sf").style.width = idwidth-20;
   document.getElementById("tab_wsf").style.width = idwidth-20;
   document.getElementById("tab_2sf").style.width = idwidth-20;
   
   document.getElementById("tab_jy_1").style.width = idwidth-20;
}
document.getElementById("tab_wsf").style.height =ieheight-370;    }else
   {
      if(idwidth>700)
{
   document.getElementById("tab_1sf").style.width = idwidth-20;
   document.getElementById("tab_wsf").style.width = idwidth-20;
   document.getElementById("tab_2sf").style.width = idwidth-20;
  
   document.getElementById("tab_jy_1").style.width = idwidth-20;
}
 document.getElementById("tab_wsf").style.height = 145;
   }
      
   
  if(idwidth>700&&ieheight>=483){
  document.getElementById("conzj").style.top= document.documentElement.scrollTop+(document.documentElement.clientHeight-document.getElementById("conzj").offsetHeight)/2
document.getElementById("conzj").style.left= document.documentElement.scrollLeft+(document.documentElement.clientWidth-document.getElementById("conzj").offsetWidth)/2;   }else if(idwidth<700&&ieheight<483)
{

document.getElementById("conzj").style.top=58;
document.getElementById("conzj").style.left=20;
document.getElementById("tab_1sf").style.width = 680;
    document.getElementById("tab_wsf").style.width = 680;
document.getElementById("tab_2sf").style.width = 680;

document.getElementById("tab_jy_1").style.width = 680;
   
}

}
window.onscroll=scall;
window.onresize=scall;
window.onload=scall;
// End -->
</SCRIPT>

Answer 1

所有的   
style.top=58 +"px";
style.left=20 +"px";
style.width = 680 +"px";
.style.height = 50 + "px";都加上  px  

Answer 2

建议使用.style.pixelTop
.style.pixelHeight
就可以直接使用=50而不需要加'px'