Edit in JSFiddle

window.onload = function () {
    
    //create paper
    var paper = Raphael("canvas");
    paper.text(100,100,"You\nare\nRaphaelist!!")
    paper.text(100,130,"あなたはクマモンです")
}

<div id="canvas"></div>

body,html
{
    height:100%;
    margin:0;
}

#canvas 
{
    height:100%;
    background:#aaa;
}