function soloNumeros(evt){ 
var key = nav4 ? evt.which : evt.keyCode; 
return (key <= 13 || (key >= 48 && key <= 57));
}
var nav4 = window.Event ? true : false;
function FormatoMoneda(Adal_num) {
Adal_num = Adal_num.toString().replace(/\$|\,/g,'');
if(isNaN(Adal_num))
Adal_num = "0";
sign = (Adal_num == (Adal_num = Math.abs(Adal_num)));
Adal_num = Math.floor(Adal_num*100+0.50000000001);
cents = Adal_num%100;
Adal_num = Math.floor(Adal_num/100).toString();
if(cents<10)
cents = "0" + cents;
for (var i = 0; i < Math.floor((Adal_num.length-(1+i))/3); i++)
Adal_num = Adal_num.substring(0,Adal_num.length-(4*i+3))+','+
Adal_num.substring(Adal_num.length-(4*i+3));
return (((sign)?'':'-') + '$' + Adal_num + '.' + cents);
}