function DrawCanvas()
{this.element=getbyid("drawkanji-canvas");var has_canvas=!!this.element.getContext;if(!has_canvas){alert(ml.no_canvas);document.location=ml.no_canvas_url;}
this.context=this.element.getContext("2d");this.has_canvas_text=(typeof this.context.fillText=='function');}
DrawCanvas.prototype.start_line=function(x,y,colour)
{this.context.lineWidth=4.0;this.colour=colour;this.context.strokeStyle=this.colour;this.context.beginPath();this.context.moveTo(x,y);}
DrawCanvas.prototype.draw_line=function(x,y)
{this.context.lineTo(x,y);this.context.stroke();}
DrawCanvas.prototype.clear=function()
{this.context.clearRect(0,0,300,300);}
DrawCanvas.prototype.draw_text=function(x,y,text)
{if(!this.has_canvas_text)
return;x-=6;y+=6;this.context.font="bold 12pt sans-serif";this.context.fillStyle=this.colour;this.context.fillText(text,x,y);}