function trimLeft (workString) {
	var i =0;
	var c = workString.length;
	if (c > 0)
		{
			while ((i < c) && (workString.charAt(i) == " ")) i++;
			if (i == c) workString ="";
			else workString = workString.substring(i,c);
		}
	return workString;
}

function checkButton() {
	var buttonObj = document.getElementById('how_button');
	if ((document.getElementById('how_input_name').className == 'greentext') && 
		(document.getElementById('how_input_code').className == 'greentext') &&
		(document.getElementById('how_input_text').className == 'greentext')) {
		buttonObj.disabled = false;
		buttonObj.value = '          Send         ';
		buttonObj.className = 'greenform'; 
	}
	else {
		buttonObj.disabled = true; 
		buttonObj.value = '   Fill all * fields   ';
		buttonObj.className = 'grayform'; 
	}
}

function checkInput( id, targetId ) {
	var idObj = document.getElementById(id);
	if (idObj.value.length !== 0) document.getElementById(targetId).className = 'greentext'; 
	else 
	document.getElementById(targetId).className = 'redtext'; 
	checkButton();
}