function sTrim(inputString, removeChar){
		var returnString = inputString;
		if (removeChar.length){
			while(''+returnString.charAt(0)==removeChar){
			returnString=returnString.substring(1,returnString.length);}
			while(''+returnString.charAt(returnString.length-1)==removeChar){
			returnString=returnString.substring(0,returnString.length-1);}
		}
		return returnString;
	}
	
	function isNumberFloat(inputString)
	{
	  return (!isNaN(parseInt(inputString))) ? true : false;
	}
	
	function letOnlyFoneNums(){
	 if ((event.keyCode < 48) || (event.keyCode > 57)){
		 if (event.keyCode != 45){ // el guion (para los telefonos)
			 event.keyCode  = 0;		
		}
	 }
	}
	
	function letOnlyNums(){
	 if ((event.keyCode < 48) || (event.keyCode > 57)){
			 event.keyCode  = 0;		
	 }
	}
	
	function letOnlyCurrency(){
	 if ((event.keyCode < 48) || (event.keyCode > 57)){
		 if (event.keyCode != 44){ // la coma de currency
			event.keyCode  = 0;
		}		
	 }
	}
	
	function letNotSpaces(){
	 if (event.keyCode == 32){
		 event.keyCode  = 0;		
	 }
	}