div的分别显示控制

< html >
< body  onload ="test();" >
< input  type =button  value ="test1"  onmouseover ="testss('0');" >
< input  type =button  value ="test2"  onmouseover ="testss('1');" >
< input  type =button  value ="test3"  onmouseover ="testss('2');" >
< input  type =button  value ="testALL"  onmouseover ="testss('3');" >
< FORM  name =test >
< div  id ="div111" > 11 </ div >    
   < div  id ="div2" > 22 </ div >    
   < div  id ="div3" > 33 </ div >  
   < div  id ="div2" > 22 </ div >    
   < div  id ="div3" > 33 </ div >  
   < div  id ="div2" > 22 </ div >    
   < div  id ="div3" > 33 </ div >  
   < div  id ="div2" > 22 </ div >    
   < div  id ="div3" > 33 </ div >  
   < div  id ="div2" > 22 </ div >    
   < div  id ="div3" > 33 </ div >  
</ FORM >
< script > ...
function test()...{
  var  bl = false;
  var   divs   =   document.all.test.getElementsByTagName("DIV");   
  for(var   i   =   0;i<divs.length;i++)   
  ...{ 
    if(divs[i].id.substring(0,3)!="div")continue;        
        if(bl==false)bl=true;
        else
            divs[i].style.display="none";  
  }
}

function testss(num)...{
document.all.div111.style.cssText='background:red';
var   divs   =   document.all.test.getElementsByTagName("DIV");   
  for(var   i   =   0;i<divs.length;i++)   
  ...{   
    if(i==num)
      divs[i].style.display="inline";  
    else
        divs[i].style.display="none";  
  }
}

if(confirm("我是googol"))...{
    document.write("googol");
}else...{
    document.write("tliu");
}
</ script >
</ body >
</ html >