Javascript集属性

I have a problem. I want to set some attributes with JS.

for(i=0;i<div_navi.childNodes.length;i++){                      
    if(div_navi.childNodes[i].nodeName =="SPAN"){
        div_navi.childNodes[i].setAttribute("onclick","getContent(div_navi.childNodes[i].textContent); 
        div_navi.childNodes[i].style.cursor ="pointer";
    }
    if(div_navi.childNodes[i].nodeName =="A")
        div_navi.childNodes[i].setAttribute("href",div_navi.childNodes[i].textContent);
    }
}

I want to set a parameter in getContent, but it doesn't work. Has anybody an idea, how this could work?