function checkContents() {
  if (document.getElementById) {
    if (document.getElementById('Header_headerSearchString').value == "Enter Keyword or Item #") {
      document.getElementById('Header_headerSearchString').value="";
      document.getElementById('Header_headerSearchString').style.color="#000000";
      document.getElementById('Header_headerSearchString').style.fontSize="12px";
    }    
  }
}