function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}

function prepareInputsForHints() {
	var inputs = document.getElementsByTagName("input");
	for (var i=0; i<inputs.length; i++){
		// test to see if the hint span exists first
	    if (inputs[i].parentNode.getElementsByTagName("span")[0]) {
	        if(inputs[i].parentNode.getElementsByTagName("span")[0].className == "hint")
	        {
			    // the span exists!  on focus, show the hint
			    inputs[i].onfocus = function () {
				    this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
			    }
			    // when the cursor moves away from the field, hide the hint
			    inputs[i].onblur = function () {
				    this.parentNode.getElementsByTagName("span")[0].style.display = "none";
			    }
			}
		}
	}
	
	// repeat the same tests as above for selects
	var selects = document.getElementsByTagName("select");
	for (var k=0; k<selects.length; k++){
		if (selects[k].parentNode.getElementsByTagName("span")[0]) {
		    if (selects[k].parentNode.getElementsByTagName("span")[0].className == "hint")
			{
			    selects[k].onfocus = function () {
				    this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
			    }
			    selects[k].onblur = function () {
				    this.parentNode.getElementsByTagName("span")[0].style.display = "none";
			    }
			}
		}
	}
	
	//textarea
	var textareas = document.getElementsByTagName("textarea");
	for (var k=0; k<textareas.length; k++){
		if (textareas[k].parentNode.getElementsByTagName("span")[0]) {
		    if (textareas[k].parentNode.getElementsByTagName("span")[0].className == "hint")
			{
			    textareas[k].onfocus = function () {
				    this.parentNode.getElementsByTagName("span")[0].style.display = "inline";
			    }
			    textareas[k].onblur = function () {
				    this.parentNode.getElementsByTagName("span")[0].style.display = "none";
			    }
			}
		}
	}
}
addLoadEvent(prepareInputsForHints);