function window_opener(url, width, height) {
   height = height ? height : 550;
   width = width ? width : 600;
   window.open(url,'_blank','alwaysRaised=yes,dependent=yes,height='+height+',width='+width+',menubar=no,resizable=yes,scrollbars=yes,status=no,toolbar=no');
   return false;
}


function trim(str) {
     s = str.replace(/^(\s)*/, '');
     s = s.replace(/(\s)*$/, '');
     return s;
}


function number_format(num)
{
	num = '' + num;
	for (i=num.length; i>0; i-=3)
	{
		num = num.substr(0, i) + ' ' + num.substr(i);
	}
	return num;
}

function getCookie( name ) {
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
		return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ';', len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}

function setCookie( name, value, expires, path, domain, secure ) {
	var today = new Date();
	today.setTime( today.getTime() );
	if ( expires ) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	document.cookie = name+'='+escape( value ) +
		( ( expires ) ? ';expires='+expires_date.toGMTString() : '' ) + //expires.toGMTString()
		( ( path ) ? ';path=' + path : ';path=/' ) +		
		( ( domain ) ? ';domain=' + domain : '' ) +
		( ( secure ) ? ';secure' : '' );
}

function deleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) document.cookie = name + '=' +
			( ( path ) ? ';path=' + path : '') +
			( ( domain ) ? ';domain=' + domain : '' ) +
			';expires=Thu, 01-Jan-1970 00:00:01 GMT';
}

function getElementsByClassName(searchClass, node, tag)
{
	var classElements = new Array();
	if (node == null)
	{
		node = document;
	}
	if (tag == null)
	{
		tag = '*';
	}
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)" + searchClass + "(\\s|$)");
	for (var i = 0, j = 0; i < elsLen; i++)
	{
		if (pattern.test(els[i].className))
		{
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

function default_filter(col)
{
	if (document.getElementById(col) && document.getElementById(col).value==document.getElementById(col).defaultValue) 
	{
		document.getElementById(col).value = '';
	}
}