function widgetWrite(position) { 
		var widgetElement = document.getElementById('pregWidget');
		var dueDate = widgetElement.getAttribute('value');	
		
		var oRequest = new XMLHttpRequest();
		var sURL  = "http://www.blimamma.se/widgets/gravid.php?d="+dueDate;
		
		oRequest.open("GET",sURL,false);
		oRequest.setRequestHeader("User-Agent","Mozilla/5.0");
		oRequest.send(null);
    	document.getElementById('pregWidget').innerHTML = oRequest.responseText;
    }
    
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

addLoadEvent(widgetWrite());