//dimScreen()
//by Brandon Goldman


function showSelectBoxes(){
	selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
}

function hideSelectBoxes(){
	selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "hidden";
	}
}


jQuery.extend({
    //dims the screen
    dimScreen: function(speed, opacity, callback) {
        if(jQuery('#__dimScreen').size() > 0) return;
        
        if(typeof speed == 'function') {
            callback = speed;
            speed = null;
        }

        if(typeof opacity == 'function') {
            callback = opacity;
            opacity = null;
        }

        if(speed < 1) {
            var placeholder = opacity;
            opacity = speed;
            speed = placeholder;
        }
        
        if(opacity >= 1) {
            var placeholder = speed;
            speed = opacity;
            opacity = placeholder;
        }

        speed = (speed > 0) ? speed : 500;
        opacity = (opacity > 0) ? opacity : 0.5;


var browserAgent = navigator.userAgent;
var startPoint;
var endPoint;
var browserVer;
if(browserAgent.indexOf('MSIE') > -1) {
startPoint = browserAgent.indexOf('MSIE') + 5;
endPoint = startPoint + 5;
browserVer = browserAgent.substring(startPoint, endPoint);
browserVer = parseFloat(browserVer);
}else {}
//alert(browserVer);
//IE6 Fix

if (browserVer<=6){
hideSelectBoxes();
        return jQuery('<div></div>').attr({
                id: '__dimScreen'
                ,fade_opacity: opacity
                ,speed: speed
            }).css({
            background: '#000'
	    ,height: $(document).height() + 'px'    
            ,left: '0px'
            ,opacity: 0
            ,position: 'absolute'
            ,top: '0px'
            ,width: $(document).width() + 'px'
            ,zIndex: 999
        }).appendTo(document.body).fadeTo(speed, 0.7, callback);
} else {
//IE6 or better
        return jQuery('<div></div>').attr({
                id: '__dimScreen'
                ,fade_opacity: opacity
                ,speed: speed
            }).css({
            background: '#000'
            ,height: document.documentElement.clientHeight
            ,left: '0px'
            ,opacity: 0
            ,position: 'fixed'
            ,top: '0px'
            ,width: $(document).width() + 'px'
            ,zIndex: 999
        }).appendTo(document.body).fadeTo(speed, 0.7, callback);
}



    },
    
    //stops current dimming of the screen
    dimScreenStop: function(callback) {
	showSelectBoxes();
        var x = jQuery('#__dimScreen');
        var opacity = x.attr('fade_opacity');
        var speed = x.attr('speed');
        x.fadeOut(speed, function() {
            x.remove();
            if(typeof callback == 'function') callback();
        });
    }
});