function fieldClear(fieldID, defaultValue) {
	var field = document.getElementById(fieldID);
	var trigger = false;
		
	field.value = defaultValue;
	field.onclick = function() {			
		if (!trigger || this.value == defaultValue) {
			this.value = "";
		}
		else {
			trigger = true;
		}
	};
	field.onfocus = function() { 
		this.select(); 
	};
	field.onblur = function() {
		this.value = !this.value?defaultValue:this.value;
		trigger = true;
	};
}