function DomCheck(){
return(document.createElement && document.getElementById)
}

function DomCorners(domid,dombk,domh,tries){
var domel=document.getElementById(domid);
if(domel==null){
    if(tries==null) tries=200;
    if(tries>0)
        setTimeout("DomCorners('"+domid+"','"+dombk+"',"+domh+","+(--tries)+")",50);
    return;
    }
var domc=new Array(4);
for(var i=0;i<4;i++){
    domc[i]=document.createElement("b");
    domc[i].style.display="block";
    domc[i].style.height=domh+"px";
    domc[i].style.fontSize="1px";
    if(i%2==0)
        domc[i].style.background="url("+dombk+") no-repeat 0 -"+ i*domh + "px";
    else
        domc[i].style.background="url("+dombk+") no-repeat 100% -"+ i*domh + "px";
    }
domc[0].appendChild(domc[1]);
domc[2].appendChild(domc[3]);
domel.style.padding="0";
domel.insertBefore(domc[0],domel.firstChild);
domel.appendChild(domc[2]);
}