random maze

function mazed(dom) {
    if (!dom){
        dom=document.createElement("div");
        var css=[
            'font-family:courier;\
            font-size:20px;\
            letter-spacing:-5px;\
            line-height: 14px;\
            padding: 4px;\
            position:absolute;top:0px;left:0px;z-index:9999;\
            border:1px solid black;background:white;\
            -webkit-transform:matrix(2,0,0,1,180,50);'
        ]
        dom.style.cssText=css.join("");

        document.body.appendChild(dom)
    }
    var m=[],line="";
    for(var i = 0; i < 1600; i++) {
        if(i&&!(i % 40)) {
            m.push(line)
            line=""
        }
        line += Math.random() < 0.5 ? "/" : "\\";
    }
    var html=m.join("<br>");
    dom.innerHTML=html;

}