function getElementPosition(element){
	var x=0,y=0;
	var x1=0,y1=0;
	x1=parseInt(element.offsetWidth);
	y1=parseInt(element.offsetHeight);
	while (element!=null){
		x+=element.offsetLeft-element.scrollLeft;
		y+=element.offsetTop-element.scrollTop;
		element=element.offsetParent;
	}
	x1=x+x1;
	y1=y+y1;
	return {x:x,y:y,x1:x1,y1:y1};
}

function showhideElements(topElement,option){
	var obj;
	var el;
	var pos,pos1;
	var i,j;
	var curForm;
	obj=topElement;
	var takar;
	//obj=document.getElementById(topElement);
	//el=obj.element;
	//alert('na');
	pos=getElementPosition(obj);
	for (j=0;j<document.forms.length;j++){
		curForm=document.forms[j];
		for (i=0;i<curForm.elements.length;i++){
			//alert (curForm.elements[i].type);
			if ((curForm.elements[i].type=='select-one') || (curForm.elements[i].type=='select-multiple')){
				el=curForm.elements[i];
				pos1=getElementPosition(el);
				//alert (el.name+' '+pos1.x+' '+pos1.y+' '+pos1.x1+' '+pos1.y1);
				takar=1;
				if (pos.x>pos1.x1 || pos.x1<pos1.x) takar=0;
				if (pos.y>pos1.y1 || pos.y1<pos1.y) takar=0;
				if (takar==1){
					//alert (el.style.visibility);
					if (option==1){
						if (el._vischanged!=1){
							el._save_visibility=el.style.visibility;
						}
						el._vischanged=1;
						el.style.visibility='hidden';
					}else{
						el.style.visibility=el._save_visibility;
						el._vischanged=0;
						//el._save_visibility=null;
					}
				}
			}
		}
	}
}

function showhint(id) { 
	if (id.style.visibility=='hidden') {
		if (window.event){
			e=window.event;
		}else{
			e=window;
		}
		id.style.top=e.clientY-20+document.body.scrollTop;
		id.style.left=e.clientX+20+document.body.scrollLeft;
		id.style.visibility='visible';
		showhideElements(id,1);
	} else {
		id.style.visibility='hidden'; 
	}
}

function hidehint(id) { 
	if (id.style.visibility=='hidden') {
		id.style.top=100;
		id.style.left=100;
		id.style.visibility='visible';
	} else {
		id.style.visibility='hidden'; 
		showhideElements(id,0);
	}
}

function emailCheck (emailStr) {
	var alertErrors = 0;
	var checkTLD=1;
	var knownDomsPat=/^(com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;

	var emailPat=/^(.+)@(.+)$/;

	var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";

	var validChars="\[^\\s" + specialChars + "\]";

	var quotedUser="(\"[^\"]*\")";

	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;

	var atom=validChars + '+';

	var word="(" + atom + "|" + quotedUser + ")";

	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");

	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");

	var matchArray=emailStr.match(emailPat);

	if (matchArray==null) {
		if (alertErrors==1) alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];

// Start by checking that only basic ASCII characters are in the strings (0-127).

	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			if (alertErrors==1) alert("Ths username contains invalid characters.");
			return false;
	   }
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			if (alertErrors==1) alert("Ths domain name contains invalid characters.");
			return false;
	   }
	}

// See if "user" is valid 

	if (user.match(userPat)==null) {
		if (alertErrors==1) 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) {
				if (alertErrors==1) alert("Destination IP address is invalid!");
				return false;
			}
		}
		return true;
	}

// Domain is symbolic name.  Check if it's valid.
 
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			if (alertErrors==1) alert("The domain name does not seem to be valid.");
			return false;
	   }
	}

/* domain name seems valid, but now make sure that it ends in a
known top-level domain (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding 
the domain or country. */

	if (checkTLD && domArr[domArr.length-1].length!=2 && 
	domArr[domArr.length-1].search(knownDomsPat)==-1) {
		if (alertErrors==1) alert("The address must end in a well-known domain or two letter " + "country.");
		return false;
	}

// Make sure there's a host name preceding the domain.

	if (len<2) {
		if (alertErrors==1) alert("This address is missing a hostname!");
		return false;
	}

// If we've gotten this far, everything's valid!
	return true;
}

//  End -->