function URLEncode(str)
{
	var SAFECHARS = "0123456789" + 					// Numeric
                    "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +  // Alphabetic
                    "abcdefghijklmnopqrstuvwxyz" +
                    "-_.!~*’()"; 					// RFC2396 Mark characters
	var HEX = "0123456789ABCDEF";  
	var plaintext = str;
	var encoded = "";
	
	for (var i = 0; i < plaintext.length; i++ ) 
	{
		var ch = plaintext.charAt(i);
		if (ch == " ") 
		{
	        encoded += "%20";                             // x-www-urlencoded, rather than %20
        } 
        else if (SAFECHARS.indexOf(ch) != -1) 
        {
	        encoded += ch;
        } 
        else 
        {
            var charCode = ch.charCodeAt(0);
	        if (charCode > 255) 
	        {
	    	    encoded += "+";
            } 
            else 
            {
	            encoded += "%";
                encoded += HEX.charAt((charCode >> 4) & 0xF);
                encoded += HEX.charAt(charCode & 0xF);
            }
        }
	} // for
	
	return encoded;
}

function isEmail(string) {
	if (string.search(/^\w+((-\w+)|(\.\w+))*\@\w+((\.|-)\w+)*\.\w+$/) != -1)
		return 1;
	else
		return 0;
}

function VaiA(pagina) {
	document.location = pagina;
}