/*********************************************************/
/* Check form                                            */
/*********************************************************/

function findObj(n, d) {
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
  d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function formSetRequirements(obj, descr, req, check)
{
	obj = findObj(obj);
	
	// set properties
	if (obj)
	{
		obj.validateReq = req;
		obj.validateCheck = check;
		obj.validateDescr = descr;
	}
}

function formSetUnique(obj, unique)
{
	obj = findObj(obj);
	
	// set properties
	if (obj)
		obj.validateUnique = unique;
}

function formUpdate(obj)
{
	if (obj.validateCheck || obj.validateReq)
	{
		err = false;
		val = obj.value;
		
		if ((val == '' || val == '-' || val == 'http://') && obj.validateReq == true)
			err = true;
		
		if (obj.validateCheck && err == false && val != '')
		{
			if (obj.validateCheck == 'url' &&
				val.substr(0,7) != 'http://' && 
				val.substr(0,8) != 'https://')
				err = true;
				
			if (obj.validateCheck == 'email' && 
				(val.indexOf('@') < 1 || val.indexOf('@') == (val.length - 1)))
				err = true;
			
			if (obj.validateCheck == 'number*' &&
				(isNaN(val) && val != '*' || parseInt(val) < 0))
				err = true;
	
			if (obj.validateCheck.substr(0,7) == 'number+')
			{	
				if (obj.validateCheck.length > 7)
					min = obj.validateCheck.substr(7,obj.validateCheck.length - 7);
				else
					min = 0;
				
				if (min == 0 && val == '-') val = 0;
				
				if (isNaN(val) || parseInt(val) < parseInt(min))
					err = true;
			}
			
			if (obj.validateCheck.substr(0,8) == 'compare:')
			{
				compare = obj.validateCheck.substr(8,obj.validateCheck.length - 8);
				compareobj = findObj(compare);
				
				if (val != compareobj.value)
					err = true;
			}
			
			if (obj.validateCheck == 'unique')
			{
				needle = obj.value.toLowerCase();
				haystack = obj.validateUnique.toLowerCase();
				
				if (haystack.indexOf('|'+needle+'|') > -1)
					err = true;
			}
		}
		
		// Change class
		if (err)
			obj.style.backgroundColor='#F8F5EF';
		else
			obj.style.backgroundColor='#FFFFFF';
		
		return (err);
	}
}


function formCheck(f)
{
	var noerrors = true;
	var first	 = false;
	var fields   = new Array();

	// Check for errors
	for (var i = 0; i < f.elements.length; i++)
	{
		if (f.elements[i].validateCheck ||
			f.elements[i].validateReq)
		{
			err = formUpdate (obj = f.elements[i]);
			
			if (err)
			{
				if (first == false) first = i;
				
				fields.push(f.elements[i].validateDescr);
				noerrors = false;
			}
		}
	}
	
	if (noerrors == false)
	{
		alert ('The following fields contain errors:' +
			   '                     \n\n – ' + 
			   fields.join('\n – ') + 
			   '\n\n' +
			   'Before you can continue you need' +
			   '\n' +
			   'to correct these errors.' +
			   '\n\n');
		
		// Select field with first error
		f.elements[first].select();
		f.elements[first].focus();
	}
	
	return (noerrors);
}