function ns4() {
     return (document.layers) ? true:false;
}

function dom1() {
     return (document.getElementById) ? true:false;
}


function changeImg(name,src) {
    if (document.images){
        document.images[name].src = src;
    }
}

function changeLayImg(layName,name,src) {
    if (ns4() && (document.images)) eval("document."+layName).document.images[name].src = src;
    else changeImg(name,src);
}

function showObj(name) {
    if (ns4()) eval("document."+name).visibility = "show";
    else if (dom1()){
		document.getElementById(name).style.visibility = "visible";
		document.getElementById(name).style.display = "block";
	}
}

function hideObj(name) {
    if (ns4()) eval("document."+name).visibility = "hide"
    else if (dom1()){
		document.getElementById(name).style.visibility = "hidden";
		document.getElementById(name).style.display = "none";
	}
}

function m_pic(i) {
    if (document.images) {
        if(i) {
            changeImg("m_pic0","/main/pics/m_pic00.jpg");
            changeImg("m_pic1","/main/pics/m_pic01.jpg");
        }
        else {
            changeImg("m_pic0","/main/pics/1pix.gif");
            changeImg("m_pic1","/main/pics/1pix.gif");
        }
    }
}