elements=[
    ['login', 'login'],
    ['pass', 'pass'],
]

function getobjecttext(objectid){
    for(i=0;i<elements.length;i++){
        if(elements[i][0] == objectid){
            return elements[i][1];
        }
    }
    return false;
}

function formblur(objectid){
    object = document.getElementById(objectid);
    if(object.value == ""){
        object.value = getobjecttext(objectid);
    }
}

function formclick(objectid){
    object = document.getElementById(objectid);
    if(object.value == getobjecttext(objectid)){
        object.value = "";
    }
}

function pageload(){
    for(i=0;i<elements.length;i++){
        document.getElementById(elements[i][0]).value = elements[i][1];
    }
}