function __toggle_buttons(string)
{
	var oForm = document.forms['theForm'];
	
	if(oForm)
	{
		for(i=0 ; i<oForm.elements.length ; i++)
		{
			switch(oForm.elements[i].type)
			{
				case 'button':
				case 'reset':
				case 'submit':
				
					oForm.elements[i].disabled = (string == 'disable' ? true : false);
					
				break;
			}
		}
	}
}

function __submit_form()
{
	var formObject = document.forms['theForm'];
	var error = false;
	
	var regexp = /^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/;
	
	if(formObject)
	{	
		if(formObject['first_name'].value.replace(/\s+/g,'').length == 0)
		{
			error = true;
			
			alert('Please enter your first name ! ');
			formObject['first_name'].focus();
		}
		else if(formObject['last_name'].value.replace(/\s+/g,'').length == 0)
		{
			error = true;
			
			alert('Please enter your last name ! ');
			formObject['last_name'].focus();
		}
		else if(formObject['email'].value.replace(/\s+/g,"").length == 0)
		{
			error = true;
			
			alert('Please enter your email address ! ');
			formObject['email'].focus();
		}
		else if(formObject['email'].value.search(regexp) == -1)
		{
			error = true;
			
			alert('Please enter a valid email address ! ');
			formObject['email'].focus();
		}
		else if(formObject['phone'].value.replace(/\s+/g,'').length == 0)
		{
			error = true;
			
			alert('Please enter your phone number ! ');
			formObject['phone'].focus();
		}
		else if(formObject['How Can We Help You?'].value.replace(/\s+/g,'').length == 0)
		{
			error = true;
			
			alert('Please specify how can we help you ! ');
			formObject['How Can We Help You?'].focus();
		}
		
		if(error)
		{
			return false;
		}
		else
		{
			__toggle_buttons('disable');
			formObject['mode'].value = 'send';
			formObject.submit();							
		}				
	}
}