//Variável que indica se o browser é IE
var browser=navigator.userAgent.toLowerCase();
var isIE=((browser.indexOf("msie")!=-1)&&(browser.indexOf("opera")==-1)&&(browser.indexOf("webtv")==-1));

//Função que retorna o tamanho da tela
function GetScreenSize()
{
    var height=0,width=0;
    if(typeof(window.innerHeight)=='number')
    {   
        height=window.innerHeight;
        width=window.innerWidth;
    }
    else if(document.documentElement&&document.documentElement.clientHeight)
    {
        height=document.documentElement.clientHeight;
        width=document.documentElement.clientWidth;
    }
    else if(document.body&&document.body.clientHeight)
    {
        height=document.body.clientHeight;
        width=document.body.clientWidth;
    }
    return{width:width,height:height,top:0,left:0};
}

//Retorna a posição de um elemendo de acordo com o scroll da tela
function GetScroll(element)
{
    var top=0,left=0;
    if(!element)
    {
        element=(document.documentElement?document.documentElement:document.body);
    }
    do
    {
        top+=element.scrollTop||0;
        left+=element.scrollLeft||0;
        element=element.parentNode;
    }
    while(element);
    
    return{left:left,top:top};
}

/**
*
*  UTF-8 data encode / decode
*  http://www.webtoolkit.info/
*
**/
 
var Utf8 = {
 
	// public method for url encoding
	encode : function (string) {
		string = string.replace(/\r\n/g,"\n");
		var utftext = "";
 
		for (var n = 0; n < string.length; n++) {
 
			var c = string.charCodeAt(n);
 
			if (c < 128) {
				utftext += String.fromCharCode(c);
			}
			else if((c > 127) && (c < 2048)) {
				utftext += String.fromCharCode((c >> 6) | 192);
				utftext += String.fromCharCode((c & 63) | 128);
			}
			else {
				utftext += String.fromCharCode((c >> 12) | 224);
				utftext += String.fromCharCode(((c >> 6) & 63) | 128);
				utftext += String.fromCharCode((c & 63) | 128);
			}
 
		}
 
		return utftext;
	},
 
	// public method for url decoding
	decode : function (utftext) {
		var string = "";
		var i = 0;
		var c = c1 = c2 = 0;
 
		while ( i < utftext.length ) {
 
			c = utftext.charCodeAt(i);
 
			if (c < 128) {
				string += String.fromCharCode(c);
				i++;
			}
			else if((c > 191) && (c < 224)) {
				c2 = utftext.charCodeAt(i+1);
				string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
				i += 2;
			}
			else {
				c2 = utftext.charCodeAt(i+1);
				c3 = utftext.charCodeAt(i+2);
				string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
				i += 3;
			}
 
		}
 
		return string;
	}
 
}