function getWindowHeight() {
  var myWidth = 0, myHeight = 0;
  if( typeof( window.innerWidth ) == 'number' ) {
    //Non-IE
    myWidth = window.innerWidth;
    myHeight = window.innerHeight;
  } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    //IE 6+ in 'standards compliant mode'
    myWidth = document.documentElement.clientWidth;
    myHeight = document.documentElement.clientHeight;
  } else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    //IE 4 compatible
    myWidth = document.body.clientWidth;
    myHeight = document.body.clientHeight;
  }
  return myHeight;
}

function getDocHeight() {
    var D = document;
    return Math.max(
        Math.max(D.body.scrollHeight, D.documentElement.scrollHeight),
        Math.max(D.body.offsetHeight, D.documentElement.offsetHeight),
        Math.max(D.body.clientHeight, D.documentElement.clientHeight)
    );
}

function resize(){  
	var frame = document.getElementById("content");  
	//var htmlheight = document.body.parentNode.scrollheight;  
	var htmlheight = getDocHeight()-16;  
	var windowheight = getWindowHeight() ;  
	if ( htmlheight < windowheight ) { 
		document.body.style.height = windowheight + "px"; 
		frame.style.height = htmlheight + "px"; 
	}  else { 
		//document.body.style.height = htmlheight + "px"; 
		//frame.style.height = htmlheight + "px"; 
	}  
	//alert('Doc height='+htmlheight+'\nWindow height='+windowheight);
} 

/**
sprintf() for JavaScript 0.6

Copyright (c) Alexandru Marasteanu <alexaholic [at) gmail (dot] com>
All rights reserved.
**/

function str_repeat(i, m) {
	for (var o = []; m > 0; o[--m] = i);
	return o.join('');
}

function sprintf() {
	var i = 0, a, f = arguments[i++], o = [], m, p, c, x, s = '';
	while (f) {
		if (m = /^[^\x25]+/.exec(f)) {
			o.push(m[0]);
		}
		else if (m = /^\x25{2}/.exec(f)) {
			o.push('%');
		}
		else if (m = /^\x25(?:(\d+)\$)?(\+)?(0|'[^$])?(-)?(\d+)?(?:\.(\d+))?([b-fosuxX])/.exec(f)) {
			if (((a = arguments[m[1] || i++]) == null) || (a == undefined)) {
				throw('Too few arguments.');
			}
			if (/[^s]/.test(m[7]) && (typeof(a) != 'number')) {
				throw('Expecting number but found ' + typeof(a));
			}
			switch (m[7]) {
				case 'b': a = a.toString(2); break;
				case 'c': a = String.fromCharCode(a); break;
				case 'd': a = parseInt(a); break;
				case 'e': a = m[6] ? a.toExponential(m[6]) : a.toExponential(); break;
				case 'f': a = m[6] ? parseFloat(a).toFixed(m[6]) : parseFloat(a); break;
				case 'o': a = a.toString(8); break;
				case 's': a = ((a = String(a)) && m[6] ? a.substring(0, m[6]) : a); break;
				case 'u': a = Math.abs(a); break;
				case 'x': a = a.toString(16); break;
				case 'X': a = a.toString(16).toUpperCase(); break;
			}
			a = (/[def]/.test(m[7]) && m[2] && a >= 0 ? '+'+ a : a);
			c = m[3] ? m[3] == '0' ? '0' : m[3].charAt(1) : ' ';
			x = m[5] - String(a).length - s.length;
			p = m[5] ? str_repeat(c, x) : '';
			o.push(s + (m[4] ? a + p : p + a));
		}
		else {
			throw('Huh ?!');
		}
		f = f.substring(m[0].length);
	}
	return o.join('');
}

// return the value of the radio button that is checked
// return an empty string if none are checked, or
// there are no radio buttons
function getRadioValue(radioObj) {
	if(!radioObj)
		return "";
	var radioLength = radioObj.length;
	if(radioLength == undefined)
		if(radioObj.checked)
			return radioObj.value;
		else
			return "";
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return radioObj[i].value;
		}
	}
	return "";
}

// set the radio button with the given value as being checked
// do nothing if there are no radio buttons
// if the given value does not exist, all the radio buttons
// are reset to unchecked
function setRadioValue(radioObj, newValue) {
	if(!radioObj)
		return;
	var radioLength = radioObj.length;
	if(radioLength == undefined) {
		radioObj.checked = (radioObj.value == newValue.toString());
		return;
	}
	for(var i = 0; i < radioLength; i++) {
		radioObj[i].checked = false;
		if(radioObj[i].value == newValue.toString()) {
			radioObj[i].checked = true;
		}
	}
}

function clear_field(field)
{
	field.value = '';
}