var defalutTextString = "社名、職種名、業界など";

function removeDefaultText() {
  if ($('header-search_form').value == defalutTextString) {
    $('header-search_form').value = "";
  }
}
function blurText(frm, elm){
    keyword = document.forms[frm].elements[elm].value;
    if (keyword == "") {
        document.forms[frm].elements[elm].value = defalutTextString;
        document.forms[frm].elements[elm].style.color = "#999";
    }
}

function focusText(frm, elm){
    keyword = document.forms[frm].elements[elm].value;
    if (keyword == defalutTextString) {
        document.forms[frm].elements[elm].value = "";
        document.forms[frm].elements[elm].style.color = "#000";
    }
}