function calculate(){
	var min=500;
	var max=2000;
	var mosquito_net_txt='no';
	var montage_txt='no';
	var widthSize=document.getElementById('widthSize');
	var heightSize=document.getElementById('heightSize');
	var sill_id=document.getElementById('sill_id');
	var outflow_id=document.getElementById('outflow_id');
	var profile=document.getElementById('profile');
	var chamber=document.getElementById('chamber');
	var mosquito_net=document.getElementById('mosquito_net');
	var montage=document.getElementById('montage');
	var price=document.getElementById('price');
	var window_id=document.getElementById('window_id');
	if(widthSize.value>2000){widthSize.value=2000;}else if(widthSize.value<500){widthSize.value=500;}
	if(heightSize.value>2000){heightSize.value=2000;}else if(heightSize.value<500){heightSize.value=500;}
	if(mosquito_net.checked==true){mosquito_net_txt='yes';}
	if(montage.checked==true){montage_txt='yes';}
	var req = new Subsys_JsHttpRequest_Js();
	req.onreadystatechange = function(){
		if (req.readyState == 4){
			if(req.responseJS.validate=='yes'){
			price.innerHTML=req.responseJS.sum+' грн.';
			}
		}
	}
	req.open('GET', 'ajax.calculate.php?event=calculate&widthSize='+widthSize.value+'&heightSize='+heightSize.value+'&sill_id='+sill_id.value+'&window_id='+window_id.value+'&outflow_id='+outflow_id.value+'&profile='+profile.value+'&chamber='+chamber.value+'&mosquito_net='+mosquito_net_txt+'&montage='+montage_txt, true);
	req.send({});
}