Apply shadow on HTML5 canvas

example:

function canvasloader(){
 var mycanvas = document.getElementById("canvas");
 var mycontext = mycanvas.getContext("2d");
 appyShadow(mycontext);
 
 drawSquare(mycontext);
 drawText(mycontext);

}

function appyShadow(context){
 context.shadowOffsetX = 5;
 context.shadowOffsetY = 5;
 context.shadowColor = 'black';
 context.shadowBlur = 5;
}


function drawText(context){
 var myText = "Hello HTML5";
 context.fillStyle = "#FF0000";
 context.fillText (myText, 50, 50);
 context.fillStyle = "#00FF00";
 context.fillText (myText, 100, 100);
 context.fillStyle = "#0000FF";
 context.fillText (myText, 150, 150);
}

function drawSquare(context){
 context.fillStyle = "gray";
 context.fillRect(25,25,200,200);
}