function focus_input_box(obj,defval,focusclass){
	if(obj.value==defval) obj.value='';
	if(focusclass) obj.className=focusclass;
}
function blur_input_box(obj,defval,blurclass){
	if(obj.value==''){
		obj.value=defval;
		if(blurclass) obj.className=blurclass;
	}
}