function limpia(elemento){
	elemento.value = "";
}
						
function verificanombre(elemento){
	if(elemento.value == "")
	elemento.value = "Name*";
}
						
function verificacorreo(elemento){
	if(elemento.value == "")
	elemento.value = "E-mail*";
}

function verificatelefono(elemento){
	if(elemento.value == "")
	elemento.value = "Phone*";
}

function verificacomentarios(elemento){
	if(elemento.value == "")
	elemento.value = "Comments*";
}

function formato(input){
	var num = input.value.replace(/\,/g,'');
	if(!isNaN(num)){
		num = num.toString().split('').reverse().join('').replace(/(?=\d*\.?)(\d{3})/g,'$1,');
		num = num.split('').reverse().join('').replace(/^[\,]/,'');
		input.value = num;
	}
	else{
	input.value = input.value.replace(/[^\d\,]*/g,'');
	}
}