url           = document.location.href;
  if(url.indexOf("?")!=-1){
	  xend          =url.substring(0,url.lastIndexOf("?")).lastIndexOf("/") + 1;
  }
  else{
  	  xend          = url.lastIndexOf("/") + 1;
  }
  var base_url  = url.substring( 0, xend );
  

//----------------------------------------------------------- ::: - ::: - ::: ------------
//----------------------------------------------------------- ::: - ::: - ::: ------------
  function ark_do( url ) {
    if ( url.substring( 0, 4 ) != 'http' ) {
      url       = base_url + url;
	 // alert(url);
    }
    var jsElem  = document.createElement('SCRIPT');
    jsElem.type = 'text/javascript';
    jsElem.src  = url;
    document.body.appendChild( jsElem );	
	
  }
  function windowOpen( name, page, params ) {
    window.open( page, 'window' + name, params );
  }

  function rollOver( object, className ) {
    object.className			= className;
  }
function emailCheck (emailStr) {
	/* The following pattern is used to check if the entered e-mail address
	   fits the user@domain format.  It also is used to separate the username
	   from the domain. */
	var emailPat=/^(.+)@(.+)$/
	/* The following string represents the pattern for matching all special
	   characters.  We don't want to allow special characters in the address. 
	   These characters include ( ) < > @ , ; : \ " . [ ]    */
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
	/* The following string represents the range of characters allowed in a 
	   username or domainname.  It really states which chars aren't allowed. */
	var validChars="\[^\\s" + specialChars + "\]"
	/* The following pattern applies if the "user" is a quoted string (in
	   which case, there are no rules about which characters are allowed
	   and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
	   is a legal e-mail address. */
	var quotedUser="(\"[^\"]*\")"
	/* The following pattern applies for domains that are IP addresses,
	   rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
	   e-mail address. NOTE: The square brackets are required. */
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
	/* The following string represents an atom (basically a series of
	   non-special characters.) */
	var atom=validChars + '+'
	/* The following string represents one word in the typical username.
	   For example, in john.doe@somewhere.com, john and doe are words.
	   Basically, a word is either an atom or quoted string. */
	var word="(" + atom + "|" + quotedUser + ")"
	// The following pattern describes the structure of the user
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
	/* The following pattern describes the structure of a normal symbolic
	   domain, as opposed to ipDomainPat, shown above. */
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
	
	
	/* Finally, let's start trying to figure out if the supplied address is
	   valid. */
	
	/* Begin with the coarse pattern to simply break up user@domain into
	   different pieces that are easy to analyze. */
	var matchArray=emailStr.match(emailPat)
	if (matchArray==null) {
	  /* Too many/few @'s or something; basically, this address doesn't
		 even fit the general mould of a valid e-mail address. */
		//alert("Email address seems incorrect (check @ and .'s)")
		return false
	}
	var user=matchArray[1]
	var domain=matchArray[2]
	
	// See if "user" is valid 
	if (user.match(userPat)==null) {
		// user is not valid
		//alert("The username doesn't seem to be valid.")
		return false
	}
	
	/* if the e-mail address is at an IP address (as opposed to a symbolic
	   host name) make sure the IP address is valid. */
	var IPArray=domain.match(ipDomainPat)
	if (IPArray!=null) {
		// this is an IP address
		  for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				//alert("Destination IP address is invalid!")
			return false
			}
		}
		return true
	}
	
	// Domain is symbolic name
	var domainArray=domain.match(domainPat)
	if (domainArray==null) {
		//alert("The domain name doesn't seem to be valid.")
		return false
	}
	
	/* domain name seems valid, but now make sure that it ends in a
	   three-letter word (like com, edu, gov) or a two-letter word,
	   representing country (uk, nl), and that there's a hostname preceding 
	   the domain or country. */
	
	/* Now we need to break up the domain to get a count of how many atoms
	   it consists of. */
	var atomPat=new RegExp(atom,"g")
	var domArr=domain.match(atomPat)
	var len=domArr.length
	if (domArr[domArr.length-1].length<2 || 
		domArr[domArr.length-1].length>3) {
	   // the address must end in a two letter or three letter word.
	   //alert("The address must end in a three-letter domain, or two letter country.")
	   return false
	}
	
	// Make sure there's a host name preceding the domain.
	if (len<2) {
	   var errStr="This address is missing a hostname!"
	   //alert(errStr)
	   return false
	}
	
	// If we've gotten this far, everything's valid!
	return true;
	}
	//  End -->
	
	function checkForm(frm,arr){ //(formulario, array de excepciones)
		var aux="";
			for(var i=0;i<document.getElementById(frm).elements.length;i++){
       			if(document.getElementById(frm).elements[i].type == "password" || document.getElementById(frm).elements[i].type == "text" || document.getElementById(frm).elements[i].type == "select"  || document.getElementById(frm).elements[i].type == "textarea" || document.getElementById(frm).elements[i].type == "select-one" || document.getElementById(frm).elements[i].type == "select multiple"){
		       		if(!in_array(arr,document.getElementById(frm).elements[i].name)){ 
						//document.frmOp.elements[i].checked = true;
						if(document.getElementById(frm).elements[i].value==""){
							aux=aux+"\n"+document.getElementById(frm).elements[i].title;
						}
						else{
							if(document.getElementById(frm).elements[i].id.indexOf('email')!=-1){
								if(!emailCheck(document.getElementById(frm).elements[i].value)){
									aux=aux+"\n"+document.getElementById(frm).elements[i].title + " no válido"
								}
							}	
						}
						
					}
				}	
		   }
		   if(aux!=""){
				aux="Debe completar los campos:" + aux;
			   	alert(aux);
				return false;
		   }
		   else{
				return true;
		   }	
	}	
	function in_array(mat,field){
			var i;
			for(i=0;i<mat.length;i++){
				if(mat[i].toLowerCase()==field.toLowerCase()){
					return true;
				}	
			}
			return false;	
	}