/*
 * This is a javascript library that handles calling JDialog.
 * Copyright (c) 2008 RECAPTCHA -- http://www.nhanviet.vn
 * AUTHORS:
 *   Le Minh Duy (duylm@nhanviet.vn)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
var isloaded = 0;	
function loadingShow(el){
	//loads 
	if(isloaded==0){
		$("#backgroundForce").css({
			"opacity": "0.7"
		});
		$("#backgroundForce").fadeIn("slow");
		$(el).fadeIn("slow");
		isloaded = 1;
	}
}

//disable
function loadingHide(el){
	if(isloaded==1){
		$("#backgroundForce").fadeOut("slow");
		$(el).fadeOut("slow");
		isloaded = 0;
	}
}

function getCenterLeft(el) {
	var w = $(el).width();
	var sw = $(window).width();
	var ret = (sw / 2) - (w / 2);
	if (document.body.scrollLeft) {
		ret += document.body.scrollLeft;
	}
	if (ret > 0) return ret;
	else return 0;
}	

function getCenterTop(el) {
	var h = $(el).height();
	var sh = $(window).height();
	var ret = (sh / 2) - (h / 2) - ($('#footer').height() / 2);
	if (document.body.scrollTop) {
		ret += document.body.scrollTop;
	}
	if (ret > 0) return ret;
	else return 0;
}
		   
//Center loading position
function centerLoading(el){		
	var windowHeight = $(window).height();
	if (document.body.scrollTop) {
		windowHeight += document.body.scrollTop;
	}

	$(el).css({
		"position": "absolute",
		"top": getCenterTop(el)+'px',
		"left": getCenterLeft(el)+'px'
	});
	//only need force for IE6		
	$("#backgroundForce").css({
		"height": windowHeight
	});		
}