var DOM1;
window.onload = function()
{
	DOM1 = (typeof document.getElementsByTagName!='undefined');
	if (typeof checkconditions!='undefined') checkconditions();
	if (typeof template_onload!='undefined') template_onload();
	prepCellAdapters();
}

Array.prototype.push = function()
{
	var n = this.length >>> 0;
	for (var i = 0; i < arguments.length; i++) 
	{
		this[n] = arguments[i];
		n = n + 1 >>> 0;
	}
	this.length = n;
	return n;
};

Array.prototype.pop = function() {
	var n = this.length >>> 0, value;
	if (n) {
		value = this[--n];
		delete this[n];
	}
	this.length = n;
	return value;
};


//defined in group.php & question.php & survey.php, but a static function
function modfield(name) 
{
    temp=document.getElementById('modfields').value;
    if (temp=='')
	{
    	document.getElementById('modfields').value=name;
    }
    else
	{
    	myarray=temp.split('|');
		if (!inArray(name, myarray))
		{
			myarray.push(name);
			document.getElementById('modfields').value=myarray.join('|');
		}
	}
}

//defined in group.php & question.php & survey.php, but a static function
function inArray(needle, haystack)
{
	for (h in haystack)
	{
		if (haystack[h] == needle) 
		{
			return true;
		}
	}
	return false;
} 

//defined in group.php & survey.php, but a static function
function match_regex(testedstring,str_regexp)
{
	// Regular expression test
	if (str_regexp == '' || testedstring == '') return false;
	pattern = new RegExp(str_regexp);
	return pattern.test(testedstring)
}

function cellAdapter(src)
{
	var eChild = null, eChildren = src.getElementsByTagName('INPUT');
	var curCount = eChildren.length;
	//This cell contains multiple controls, don't know which to set.
	if (eChildren.length > 1)
	{
		//Some cells contain hidden fields
		for (i = 0; i < eChildren.length; i++)
		{
			if ( (eChildren[i].type == 'radio' || eChildren[i].type == 'checkbox') && eChild == null)
				eChild = eChildren[i];
			else if ( (eChildren[i].type == 'radio' || eChildren[i].type == 'checkbox') && eChild != null)
			{
				//A cell with multiple radio buttons; unhandled
				return;
			}
		}
	}
	else
	{
		eChild = eChildren[0];
	}
	if (eChild.type == 'radio') eChild.checked = true;
	else if (eChild.type == 'checkbox') eChild.checked = !eChild.checked;
	if (typeof modfield != 'undefined') modfield(eChild.name);
}

function prepCellAdapters()
{
	if (!DOM1) return;
	var formCtls = document.getElementsByTagName('INPUT');
	var ptr = null;
	var foundTD = false;
	for (var i = 0; i < formCtls.length; i++)
	{
		ptr = formCtls[i];
		if (ptr.type == 'radio' || ptr.type == 'checkbox')
		{
			foundTD = false;
			while (ptr && !foundTD)
			{
				if(ptr.nodeName == 'TD')
				{
					foundTD = true;
					ptr.onclick = 
						function(){
							return cellAdapter(this);
						};
					continue;
				}
				ptr = ptr.parentNode;	
			}	
		}
	}
}