/**
+	clearField()
+
+	@requires
+		none
+
+	@arguments
+		field - the DOM object whose value you wish to clear (will almost always be the self-reference of this)
+		text - the default text of the field
*/
function clearField(field, text) {
	if (field.value == text) { field.value = ""; }
	return;
}

/**
+	fillField()
+
+	@requires
+		isblank()
+
+	@arguments
+		field - the DOM object whose value you wish to fill (will almost always be the self-reference of this)
+		text - the default text of the field
*/
function fillField(field, text) {
	if (isblank(field.value)) { field.value = text; }
	return;
}

// finds if a string is blank (nothing but spaces)
function isblank(x) {
	var blank = true;
	for (i = 0; i < x.length; i++) {
		if (x.charAt(i) != ' ') { blank = false; }
	}
	return blank;
}

sfHover = function() {
	var submitRoll = document.getElementById("submit-roll");
		submitRoll.onmouseover=function() {
			this.className+=" sfhover";
		}
		submitRoll.onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);