function validChars(string) {

    var valid="0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_"



    for (var i=0; i < string.length; i++) {

        if (valid.indexOf(string.charAt(i)) < 0) {

            return false;

        }

    }

	return true;

}

function validateCondition(condition,error_space,msg,rval) {

	var newrval = rval;

	var errorMsg = document.getElementById(error_space);

	if(!condition) {

		errorMsg.style.display = '';

		errorMsg.innerHTML = msg;
		
		new Effect.Highlight(error_space,{duration:.10});

		var newrval = false;

	}

	else {

		errorMsg.style.display = 'none';

		errorMsg.innerHTML = "";

	}

	return newrval;

}