$(document).ready(function() {
  populateElement('#zoekterm', "zoeken");
  
});



function populateElement(selector, defvalue) {
  $(selector).each(function() {
    if($.trim(this.value) == "") {
      this.value = defvalue;
    }
  });

  $(selector).focus(function() {
    if(this.value == defvalue) {
      this.value = "";
    }
  });
  
  $(selector).blur(function() {
    if($.trim(this.value) == "") {
      this.value = defvalue;
    }
  });
 }