//set the specified select box's value to the passed-in value
function selectBoxValue(box,val)
{
	for (var i=0; i<box.options.length; ++i)
	{
		if (box.options[i].value == val)
			box.selectedIndex = i;
	}
}

//resets all the elements in the form to neutral values
function resetForm(theForm)
{
	for (var i=0; i<theForm.elements.length; ++i)
	{
		if (theForm.elements[i].type == "text")
			theForm.elements[i].value = "";
		else if (theForm.elements[i].type.substr(0,6) == "select")
			theForm.elements[i].selectedIndex = 0;
	}
}

//constructs a url parameter string out of an assoc. array
function arrayToString(theArray)
{
	var msg = "";
	for (var field in theArray)
	{
		msg += field + "=" + escape(theArray[field]) + "&"
	}
	return msg;
}
// onkeypress="return isNumberKey(event);"
function isNumberKey(e)
{
	var keynum;
	if(window.event) // IE
	  keynum = e.keyCode;
	else if(e.which) // Netscape/Firefox/Opera
	  keynum = e.which;
	  
	for (var i=1; i<arguments.length; ++i)
	{
		if (keynum == arguments[i].charCodeAt(0))
			return true;
	}
	  
	return ((keynum>=48 && keynum<=57) || keynum==8 || !keynum); //only numbers and backspace
}