/*** 
	onkeypress="return txtBoxFormat(this.form, this.name, '99999-999', event);" maxlength="9"> 
***/


function txtBoxFormat(objForm, strField, sMask, evtKeyPress) {
	var i, nCount, sValue, fldLen, mskLen,bolMask, sCod, nTecla;
	if(document.all) { // Internet Explorer
		nTecla = evtKeyPress.keyCode; 
	}
	else if(document.layers) { // Nestcape
		nTecla = evtKeyPress.which;
	}
	else if(document.getElementsByTagName('body')) { // Fire fox by Allan Rodrigues
		nTecla = evtKeyPress.which;
	}

	sValue = objForm[strField].value;	
	// Limpa todos os caracteres de formatação que
	// já estiverem no campo.
	sValue = sValue.toString().replace( "-", "" );
	sValue = sValue.toString().replace( "-", "" );
	sValue = sValue.toString().replace( ".", "" );
	sValue = sValue.toString().replace( ".", "" );
	sValue = sValue.toString().replace( "/", "" );
	sValue = sValue.toString().replace( "/", "" );
	sValue = sValue.toString().replace( "(", "" );
	sValue = sValue.toString().replace( "(", "" );
	sValue = sValue.toString().replace( ")", "" );
	sValue = sValue.toString().replace( ")", "" );
	sValue = sValue.toString().replace( " ", "" );
	sValue = sValue.toString().replace( " ", "" );
	sValue = sValue.toString().replace( "\:", "" );
	fldLen = sValue.length;
	mskLen = sMask.length;
	
	i = 0;
	nCount = 0;
	sCod = "";
	mskLen = fldLen;
	
	while (i <= mskLen) {
		bolMask = ((sMask.charAt(i) == "-") || (sMask.charAt(i) == ".") || (sMask.charAt(i) == "/") || (sMask.charAt(i) == "\:"))
		bolMask = bolMask || ((sMask.charAt(i) == "(") || (sMask.charAt(i) == ")") || (sMask.charAt(i) == " "))
		if (bolMask) {
			sCod += sMask.charAt(i);
			mskLen++; 
		}else {
			sCod += sValue.charAt(nCount);
			nCount++;
		}
		i++;
	}

	objForm[strField].value = sCod;
	
	if (nTecla != 8) { // backspace
		if (sMask.charAt(i-1) == "9") { // apenas números...
			return ((nTecla > 47) && (nTecla < 58));   // números de 0 a 9
		}else { // qualquer caracter...
			return true;
		} 
	}else {
		return true;
	}
}