/**
 * returnXhrRequestFromFormStr
 * @param element (dom element)
 * @return string
 * @TODO: add support for radio buttons
 */
function returnXhrRequestFromFormStr(element)
{
    var len = element.elements.length;
	var str = '';
 
	if(typeof(element)=='string'){
		element = $(element);
	}
 
    for (var i = 0; i < len; i++)
	{
		var e = element.elements[i];
 
       	if(e.id != '' &#038;&#038; e.id != undefined)
		{
			if(e.type == 'text'){ // text elements
				str+= '&#038;'+e.id+'='+encodeURI(escape(e.value));
			}
			else if(e.type=='checkbox' &#038;&#038; e.checked==true){ // checkbox is checked
				str+= '&#038;'+e.id+'=1';
			}
			else if(e.type=='checkbox' &#038;&#038; e.checked==false){  // checkbox is not checked
				str+= '&#038;'+e.id+'=0';
			}
			else if(e.type=='radio' &#038;&#038; e.checked==true)
			{
				str+= '&#038;'+e.name+'='+encodeURI(escape(e.value));
			}
			else if(e.type=='select-one') // select values should also include selectedIndexes text
			{
				var index = $(e.id).selectedIndex;
				if(index != -1){
					str+= '&#038;'+e.id+'_text='+encodeURI(escape(e.options[index].text));
					str+= '&#038;'+e.id+'='+encodeURI(escape(e.value));
				}
			}
			else if(e.type=='select-multiple') // multiple select
			{
				var valueArr = new Array();
				var textArr = new Array();
				for(var j=0;j<e.length;j++){
					if(e.options[j].selected==true){
						valueArr.push(encodeURI(escape(e.options[j].value)));
						textArr.push(encodeURI(escape(e.options[j].text)));
					}
				}
				str+='&#038;'+e.id+'_jsonValue='+JSON.encode(valueArr);
				str+='&#038;'+e.id+'_jsonText='+JSON.encode(textArr);
			}
			else{ // all other elements
				str+= '&#038;'+e.id+'='+encodeURI(escape(e.value));
			}
        }
    }
 
	return str;
}