UI_CONTROL.js

var button_active ="skyd_button_active";
var button_normal ="skyd_button_normal";
var button_pressed ="skyd_button_pressed";
var button_hover ="skyd_button_hover";
var button_disabled ="skyd_button_disabled";

function addCssClass(obj, css){
	if(obj.className!=null){
		var arr=obj.className?obj.className.split(" "):[];
		var idx=arr.indexOf(css);
		if(idx===-1){
			arr.push(css);
			obj.className=arr.join(" ")
		}
	} else {
		obj.className=css;
	}
}

function removeCssClass(obj, css){
	if(obj.className!=null){
		var arr=obj.className.split(" ");
		var idx=arr.indexOf(css);
		if(idx!==-1){
			arr.splice(idx, 1);
			obj.className=arr.join(" ")
		}
	}
}

function buttonMouseOver(){
	removeCssClass(this, button_normal);
	removeCssClass(this, button_active);
	removeCssClass(this, button_disabled);
	removeCssClass(this, button_pressed);
	if(this.style.display!=="none") {
		addCssClass(this, button_hover)
	}
}

function buttonMouseOut(){
	updateButtonNormalState(this);
}

function buttonMouseDown(){
	removeCssClass(this, button_normal);
	removeCssClass(this, button_active);
	removeCssClass(this, button_disabled);
	removeCssClass(this, button_hover);
	if(this.style.display!=="none") {
		addCssClass(this, button_pressed);
	}
}

function updateButtonNormalState(obj){
	removeCssClass(obj, button_normal);
	removeCssClass(obj, button_active);
	removeCssClass(obj, button_disabled);
	removeCssClass(obj, button_hover);
	removeCssClass(obj, button_pressed);
	if(obj.disabled==false && obj.style.display!=="none"){
		if(obj.type=="submit") {
			addCssClass(obj, button_active);
		} else {
			addCssClass(obj, button_normal);
		}
	} else {
		addCssClass(obj, button_disabled);
	}
}

function activeButton(obj, active){
	obj.disabled = !active;
	updateButtonNormalState(obj);
}

function initButton(){
	var btn = document.getElementsByTagName("button");
	for(var i=0; i<btn.length; i++) {
		btn[i].onmouseover=buttonMouseOver;
		btn[i].onmouseout=buttonMouseOut;
		btn[i].onmouseup=buttonMouseOut;
		btn[i].onmousedown=buttonMouseDown;
		updateButtonNormalState(btn[i]);
	}
}