var CW, CH;

function isIE(){
	ua=navigator.userAgent;
	if (ua.indexOf("MSIE") > -1) return true;
	else return false;
}
function onLoad(){
	if(isIE()){
		CW=document.body.clientWidth;
		CH=document.body.clientHeight;
	}else{
		CW=window.innerWidth;
		CH=window.innerHeight;
	}
}
function loadImage(path) {
      var image = new Image();
      image.src = path;
      return image;
} 
function trim(str) {
	chars=" ";
    return ltrim(rtrim(str, chars), chars);
}

function ltrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}

function rtrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}
function isEmpty(value){
	if (trim(value) == "") return true;
	else return false;
}
//////////////////////////
function calculator_check_forms(el){
	var d = document;
	var id = el.id;
	if (id == 'supervize_work'){
		if (d.getElementById(id).checked){
			d.getElementById('supervize_wtransport_val').disabled = 0;
			d.getElementById('supervize_wotransport_val').disabled = 0;
		}else{
			d.getElementById('supervize_wtransport_val').disabled = 1;
			d.getElementById('supervize_wotransport_val').disabled = 1;
		}
	}
	try{
		if (d.getElementById(id).checked) d.getElementById(id+'_val').disabled = 0;
		else d.getElementById(id+'_val').disabled = 1;
	}catch (e){
		void(0);
	}
}
function change_menu_button(id){
	if(document.getElementById('top_menu_'+id+'_c').className == 'top_menu_c'){
		document.getElementById('top_menu_'+id+'_l').className = 'top_menu2_l';
		document.getElementById('top_menu_'+id+'_c').className = 'top_menu2_c';
		document.getElementById('top_menu_'+id+'_r').className = 'top_menu2_r';
	}else{
		document.getElementById('top_menu_'+id+'_l').className = 'top_menu_l';
		document.getElementById('top_menu_'+id+'_c').className = 'top_menu_c';
		document.getElementById('top_menu_'+id+'_r').className = 'top_menu_r';
	}
}