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function doClick(linkId){

var fireOnThis = document.getElementById(linkId);

if (document.createEvent)
{
var evObj = document.createEvent('MouseEvents');
evObj.initEvent( 'click', true, false );
fireOnThis.dispatchEvent(evObj);
}
else if (document.createEventObject)
{
fireOnThis.fireEvent('onclick');
}
}


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onkeyup
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onkeydown
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function document.onkeydown()
{
  if ( event.keyCode=='39' ) //->ÓÒ¼ýÍ·
  {
  window.open("http://www.163.com");
  }
}



function document.onkeypress()
{
  if ( event.keyCode=='43' )
  {
  alert( 'ÄãÊäÈëÁ˼üÅÌµÄ ¡° + ¡± ¼ü');


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