function checkEmail(id) {
	var str=$(id).value;
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
	if (filter.test(str))
		return true;
	else{
		return false;
	}
}

function isNumeric(sText)

{
   var ValidChars = "0123456789";
   var IsNumber=true;
   var Char;
 
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         IsNumber = false;
         }
      }
   return IsNumber;
   
}

function isset(variable_name)
{
	try
	{
		if (typeof(eval(variable_name)) != 'undefined')
		if (eval(variable_name) != null)
		return true;
	} catch(e) { }

return false;
}

function runFunction(functionName) {

	if (isset(functionName)) {
		eval(functionName).call();
	}

}