var ie=(((navigator.userAgent.indexOf("MSIE")>-1)||(navigator.userAgent.indexOf("Mozilla/5.0")>-1))&&navigator.userAgent.indexOf("Opera")==-1?true:false);
var ns=(navigator.userAgent.indexOf("Netscape")>-1&&navigator.userAgent.indexOf("Opera")==-1?true:false);


function mask(str,textbox,loc,delim){
var locs = loc.split(',');

for (var i = 0; i <= locs.length; i++){
	for (var k = 0; k <= str.length; k++){
	 if (k == locs[i]){
	  if (str.substring(k, k+1) != delim){
	    str = str.substring(0,k) + delim + str.substring(k,str.length)
	  }
	 }
	}
 }
textbox.value = str
}


//-------------------------------

// This function take out the invalid characteres, just send as parameters the 
// control to validate and size
function RetiraCaracteresInvalidos(strCampo,tam) {
	nTamanho = strCampo.length;
	szCampo = "";
	j=0;
	for (i = nTamanho-1;i>=0;i--) 
	{
		if (isDigit(strCampo.charAt(i)))	{
			szCampo = strCampo.charAt(i) + szCampo;
			j++;
			if (j > tam) break;
		}
	}
	if (szCampo.length < tam) {
		for (i = szCampo.length;i<tam;i++) 
		{
			szCampo = "0" + szCampo;
		}
	}
    return szCampo;
}

// This function ajust the date, just send as parameters the input field and the event
function ajustar_data(input, evento)
{
         var BACKSPACE=  8; 
         var DEL=  46; 
         var FRENTE=  39; 
         var TRAS=  37; 
         
         // tecla means key ( from keyboard)
         var tecla= (evento.keyCode ? evento.keyCode: evento.which ? evento.which : evento.charCode)
         if (( tecla == BACKSPACE )||(tecla == DEL)||(tecla == FRENTE)||(tecla == TRAS)) {
             return true; 
             }
         if ( tecla == 13 )     return false; 


        // tecla means key (from keybord)
		if ((tecla<48)||(tecla>57)) {
			evento.returnValue =  
			 
			false; return false; 
				} else{if((input.value.length==2)||(input.value.length==5)) {
				   input.value=input.value + "/" ;
				   }
			}
			//
			//
  return true;			
};

//-------------------------------

// this functins edits the date. PArameters field and size
function editadata(strCampo,tam) {
    var i;
    var j;
    var nTamanho; // nsize
    var szCampo; //szField
	nTamanho = strCampo.length;
	szCampo = "";
	j=0;
	for (i = nTamanho-1;i>=0;i--) 
	{
		if (isDigit(strCampo.charAt(i)))	{
			szCampo = strCampo.charAt(i) + szCampo;
		    j++;
			if (j > tam) break;
        }
	}
	if (szCampo.length < tam) {
		//for (i = szCampo.length;i<tam;i++) 
		//{
		//	szCampo = "0" + szCampo;
		//}
	}
	if (j==0) return "";
    return (szCampo.substr(0,2)+"/"+szCampo.substr(2,2)+"/"+szCampo.substr(4,4));
}

//-------------------------------
function isDigit (c){   
	
	    return ((c >= "0") && (c <= "9"))
    }