function checkForm()
{
  var valid = true;
	for (i=0; i < this.length; i++)
	{
		if ($(this[i]).hasClass("compulsory"))
		{
			var type = this[i].type.toLowerCase();
			if (type == "textarea" || type == "text" || type == "password"){
				if (this[i].value == this[i].defaultValue || this[i].value == "")
				{
				  $(this[i]).addClass("errorField");	
				 	valid = false;
				}
				else
				{
				  $(this[i]).removeClass("errorField");				
				}
			}
			else 
			{
				if (type == "checkbox" && !this[i].checked)
				{
				 	valid = false;
				}
			}
		}
	}
	if(!valid)
	{
		alert('Please fill in required fields.')
	}
	else
	{
		for (i=0; i < this.length; i++)
		{
			var type = this[i].type.toLowerCase();
			if (type == "textarea" || type == "text" || type == "password")
			{
				if(this[i].value == this[i].defaultValue)
				{
					this[i].value = '';
				}
			}
		}		
	}
	return valid;
}

function checkValue ()
{
	if(this.value == this.defaultValue)
	{
		this.value = "";
	}
	else if(this.value=="")
	{
		this.value = this.defaultValue;
	}
}

$(document).ready(function(){  
  $("#contactForm").bind("submit", checkForm);
  $("#contactForm textarea, #contactForm input[type='text']").each(function(){
    $(this).bind("focus", checkValue);
    $(this).bind("blur", checkValue);
  });
});