//modificada por Rolando Avalos Avalos para Zews S.A

// NOTE: Backspace = 8 / Enter = 13 / '0' = 48 | '9' = 57 / 46='.' / 44=',' / 45='-' / 32=''
var nav4 = window.Event ? true : false;  

function NumTelef(evt){ 
    var key = nav4 ? evt.which : evt.keyCode;
    //alert(key);
	return (key <= 13 || (key >= 48 && key <= 57)||key==45);
	
}
function SoloNum(evt){ 
    var key = nav4 ? evt.which : evt.keyCode;
    return (key <= 13 || (key >= 48 && key <= 57));
}

/********************************************************************************************/
function checkLen(Input,countInput,limit){

		if(Input.value.length <=limit){
			countInput.value =Input.value.length + ' de ' + limit + ' caracteres';
		}else{
			Input.value = Input.value.substring(0, limit);
		}
	}	
/********************************************************************************************/
/** quita los blancos al inicio */
function quitaBlancos(Input){	
  while(''+Input.value.charAt(0)==' ')
  {Input.value=Input.value.substring(1,Input.value.length);}
}
/********************************************************************************************/
function externalLinks()
{
	 if (!document.getElementsByTagName) return; 
	 var anchors = document.getElementsByTagName("a");
	 for (var i=0; i<anchors.length; i++)
	 { 
	   var anchor = anchors[i];
	   if(anchor.getAttribute("href") && anchor.getAttribute("rel") == "external")
	     anchor.target = "_blank";
	 }
}
/********************************************************************************************/