//content overlay functions
/***********************************************
* Drop Down/ Overlapping Content- © Dynamic Drive (www.dynamicdrive.com)
* This notice must stay intact for legal use.
* Visit http://www.dynamicdrive.com/ for full source code
***********************************************/
//----------------------------------
function getposOffset(overlay, offsettype){
//----------------------------------
	var totaloffset=(offsettype=="left")? overlay.offsetLeft : overlay.offsetTop;
	var parentEl=overlay.offsetParent;
	while (parentEl!=null){
		totaloffset=(offsettype=="left")? totaloffset+parentEl.offsetLeft : totaloffset+parentEl.offsetTop;
		parentEl=parentEl.offsetParent;
	}
	return totaloffset;
}
//----------------------------------
function overlay(curobj, subobjstr, opt_position){
//----------------------------------
	if (document.getElementById){
		var subobj=document.getElementById(subobjstr)
		subobj.style.display=(subobj.style.display!="block")? "block" : "none"
		var xpos=getposOffset(curobj, "left")+((typeof opt_position!="undefined" && opt_position.indexOf("right")!=-1)? -(subobj.offsetWidth-curobj.offsetWidth) : 0) 
		var ypos=getposOffset(curobj, "top")+((typeof opt_position!="undefined" && opt_position.indexOf("bottom")!=-1)? curobj.offsetHeight : 0)
		subobj.style.left=xpos+"px"
		subobj.style.top=ypos+"px"
		return false
	}
	else
		return true
}
//----------------------------------
function overlayclose(subobj){
//----------------------------------
	document.getElementById(subobj).style.display="none"
}
/*****************************************************
* Form validation functions
****************************************************/
//----------------------------------
function mand(obj){
//----------------------------------
	var str = obj.value;
	if(str == null || str.length == 0){
		alert('This field is required.');
		obj.focus();
		return false;
	}
	else{
		return true;	
	}
}
//----------------------------------
function isEmailAddr(obj){
//----------------------------------
	var str = obj.value;
	var re = /^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/;
	if(!str.match(re)){
		alert("Email address entered appears to be invalid. Please check to make sure you typed it correctly.");
		return false;
	}else{
		return true;
	}
}
//----------------------------------
function makeActive(objName){
//----------------------------------
	//alert('in make mand');
	var obj = document.getElementById(objName);
	if(obj){
		obj.disabled = false;
		obj.focus();
	}
}
//----------------------------------
function makeVisable(objName){
//----------------------------------
	var obj = document.getElementById(objName);
	if(obj){
		obj.style.display="block";
	}
	makeActive('carTypeOther');
}
//----------------------------------
function resetState(){
//----------------------------------
	var otherTextBox = document.getElementById('other');
	if(otherTextBox){
		if(otherTextBox.disabled == false){
			otherTextBox.disabled = true;
		}
	}
	var carsDiv = document.getElementById('cars');
	if(carsDiv){
		if(carsDiv.style.display == 'block'){
			carsDiv.style.display = 'none';
		}
		var carOther = document.getElementById('carTypeOther');
		if(carOther){
			if(carOther.disabled == false){
				carOther.disabled = true;
			}
		}
	}
}