function validateClass() {
			
	var error = 0;
	
	
	this.email = function( address ) {
		
		var cont = true;
		
		if( address.length ) {
			while(address.indexOf(" ") == 0 )
				address = address.substring(1,address.length);
				
			while( address.lastIndexOf(" ") == address.length-1 && cont ) {
				address = address.substring(0,address.length-1);
			}
		}
			
		var correct = true;
		var posAt = address.indexOf("@");
		var posLastAt = address.lastIndexOf("@");
		var posDot = address.lastIndexOf(".");
		var length = address.length;
		
		if( posAt < 1 || posAt != posLastAt ) {
			correct = false;
			error = 1;
		}
		
		if( posDot == -1 || (posDot+2) >= length ) {
			correct = false;
			error = 2;
		}
		
		if( (posAt + 1) >= posDot ) {
			correct = false;
			error = 3;
		}
		
		if( address.indexOf(" ") != -1 ) {
			correct = false;
			error = 4;
		}
		
		if( address.length < 6 ) {
			correct = false;
			error = 5;
		}
		
		return correct;
	}
	
	
	this.Err = function() {
		var temp = error;
		error = 0;
		return temp;
	}
	
}