function CheckURL(url) {
    var RegExp = /^(([\w]+:)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/; 
    if(RegExp.test(url) && Left(url,7) == 'http://') { return true;	} else { return false; }
}

function CheckEmail(email){ 
	email = email.toLowerCase();
    var RegExp = /^((([a-z]|[0-9]|!|#|$|%|&|'|\*|\+|\-|\/|=|\?|\^|_|`|\{|\||\}|~)+(\.([a-z]|[0-9]|!|#|$|%|&|'|\*|\+|\-|\/|=|\?|\^|_|`|\{|\||\}|~)+)*)@((((([a-z]|[0-9])([a-z]|[0-9]|\-){0,61}([a-z]|[0-9])\.))*([a-z]|[0-9])([a-z]|[0-9]|\-){0,61}([a-z]|[0-9])\.)[\w]{2,4}|(((([0-9]){1,3}\.){3}([0-9]){1,3}))|(\[((([0-9]){1,3}\.){3}([0-9]){1,3})\])))$/ 
    if(RegExp.test(email)){ return true; } else { return false; } 
} 

function trim( str, charlist ) {
    var whitespace, l = 0;
	if (!charlist) {whitespace = ' \n\r\t\f\x0b\xa0\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u200b\u2028\u2029\u3000';}
	else {whitespace = charlist.replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^\:])/g, '\$1');}
    l = str.length;
    for (var i = 0; i < l; i++) {if (whitespace.indexOf(str.charAt(i)) === -1) {str = str.substring(i); break;}}
    l = str.length;
    for (i = l - 1; i >= 0; i--) {if (whitespace.indexOf(str.charAt(i)) === -1) {str = str.substring(0, i + 1);break;}}
	return whitespace.indexOf(str.charAt(0)) === -1 ? str : '';
}