function checkNumeric(o){
	o.value =o.value.replace(/,/g,".");
	o.value =o.value.replace(/[^0-9.]/g,"");	
	if(o.value == "") o.value =0;
}

function isNum(numero){
	numRegExp = /^[0-9 ]+$/
	return numRegExp.test(numero);	
}


function isDecimal(numero){
	if(!numero) return false;
	decimalRegExp = /^-?(0|[1-9]{1}\d{0,})(\.(\d{1}\d{0,}))?$/
	return decimalRegExp.test(numero);

}
function checkID(o){
	o.value =o.value.replace(/[^a-zA-Z0-9_]/g,"");		
}
function isPassword(cadena){
	var re = /[0-9A-Za-z\.]/;
	return(re.test(cadena));
}

function isPhone(cadena){
	var re = /\+?\d+ /g;
	return(re.test(cadena));
}

function isAlfaNum(cadena){
	var re = /\W/ig;
	return(!re.test(cadena));
}
function isDNI(dni){
	return(/\d{8}[a-zA-Z]{1}$/.test(dni));
	
}
function isMail(cadena){
    var b=/^[^@\s]+@[^@\.\s]+(\.[^@\.\s]+)+$/;
	return(b.test(cadena));
}

function isDomain(nname)
{
	var arr = new Array(
	'.com','.net','.org','.biz','.coop','.info','.museum','.name',
	'.pro','.edu','.gov','.int','.mil','.ac','.ad','.ae','.af','.ag',
	'.ai','.al','.am','.an','.ao','.aq','.ar','.as','.at','.au','.aw',
	'.az','.ba','.bb','.bd','.be','.bf','.bg','.bh','.bi','.bj','.bm',
	'.bn','.bo','.br','.bs','.bt','.bv','.bw','.by','.bz','.ca','.cc',
	'.cd','.cf','.cg','.ch','.ci','.ck','.cl','.cm','.cn','.co','.cr',
	'.cu','.cv','.cx','.cy','.cz','.de','.dj','.dk','.dm','.do','.dz',
	'.ec','.ee','.eg','.eh','.er','.es','.et','.fi','.fj','.fk','.fm',
	'.fo','.fr','.ga','.gd','.ge','.gf','.gg','.gh','.gi','.gl','.gm',
	'.gn','.gp','.gq','.gr','.gs','.gt','.gu','.gv','.gy','.hk','.hm',
	'.hn','.hr','.ht','.hu','.id','.ie','.il','.im','.in','.io','.iq',
	'.ir','.is','.it','.je','.jm','.jo','.jp','.ke','.kg','.kh','.ki',
	'.km','.kn','.kp','.kr','.kw','.ky','.kz','.la','.lb','.lc','.li',
	'.lk','.lr','.ls','.lt','.lu','.lv','.ly','.ma','.mc','.md','.mg',
	'.mh','.mk','.ml','.mm','.mn','.mo','.mp','.mq','.mr','.ms','.mt',
	'.mu','.mv','.mw','.mx','.my','.mz','.na','.nc','.ne','.nf','.ng',
	'.ni','.nl','.no','.np','.nr','.nu','.nz','.om','.pa','.pe','.pf',
	'.pg','.ph','.pk','.pl','.pm','.pn','.pr','.ps','.pt','.pw','.py',
	'.qa','.re','.ro','.rw','.ru','.sa','.sb','.sc','.sd','.se','.sg',
	'.sh','.si','.sj','.sk','.sl','.sm','.sn','.so','.sr','.st','.sv',
	'.sy','.sz','.tc','.td','.tf','.tg','.th','.tj','.tk','.tm','.tn',
	'.to','.tp','.tr','.tt','.tv','.tw','.tz','.ua','.ug','.uk','.um',
	'.us','.uy','.uz','.va','.vc','.ve','.vg','.vi','.vn','.vu','.ws',
	'.wf','.ye','.yt','.yu','.za','.zm','.zw');
	
	var mai = nname;
	var val = true;
	
	var dot = mai.lastIndexOf(".");
	var dname = mai.substring(0,dot);
	var ext = mai.substring(dot,mai.length);
	//alert(ext);
		
	if(dot>2 && dot<57)
	{
		for(var i=0; i<arr.length; i++)
		{
		  if(ext == arr[i])
		  {
			val = true;
			break;
		  }	
		  else
		  {
			val = false;
		  }
		}
		if(val == false)
		{
			 return false;
		}
		else
		{
			for(var j=0; j<dname.length; j++)
			{
			  var dh = dname.charAt(j);
			  var hh = dh.charCodeAt(0);
			  if((hh > 47 && hh<59) || (hh > 64 && hh<91) || (hh > 96 && hh<123) || hh==45 || hh==46)
			  {
				 if((j==0 || j==dname.length-1) && hh == 45)	
				 {
					  return false;
				 }
			  }
			else	{
				 return false;
			  }
			}
		}
	}
	else
	{
	 return false;
	}	
	
	return true;
}
function isURL(string) {
	if(!string) return false;
	string = "HTTP://"+string.toUpperCase().replace("HTTP://","");	
	string = string.toLowerCase();
	urlRegExp = /^(((ht|f)tp(s?))\:\/\/)([0-9a-zA-Z\-]+\.)+[a-zA-Z]{2,6}(\:[0-9]+)?(\/\S*)?$/
	return urlRegExp.test(string);

}