function isEmail(string) {
		if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1)
			return true;
		else
			return false;
	   }     
	function isPhone(string) {
		if (string.search(/[0-9][0-9][0-9]\.[0-9][0-9][0-9]\.[0-9][0-9][0-9][0-9]/) != -1)
			return true;
		else
			return false; 
	}
	
	function isString(string){
	if (string.search(/^\w+((-\w+)|(\.\w+))*/) != -1)
			return true;
		else
			return false;
	   }