document.write('
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  1. function draw_signature(e)
  2. {
  3.   //document.getElementById("content") or $("#content")[0] it\'s basically the same
  4.   var objContent = $("#content")[0];
  5.   var xClicked   = e.pageX - objContent.offsetLeft;
  6.   var yClicked   = e.pageY - objContent.offsetTop;
  7.   var ctx        = objContent.getContext("2d");
  8.  
  9.   ctx.beginPath();
  10.   ctx.moveTo(xClicked, yClicked);
  11.   ctx.lineTo(xClicked + 1, yClicked + 1);  
  12.   ctx.stroke();  
  13. }
');