function checkForm()
{
	var clname, ctelephone, cemail;
   	with(window.document.contactusform)
   	{
      	clname   = lastname;
	  	ctelephone = telephone;
      	cemail   = email;
   	}
	
	if(trim(clname.value) == '' || trim(clname.value) == null)
   	{
      	alert('Please enter your Last Name!');
      	clname.focus();
      	return false;
   	}
   	else if(trim(cemail.value) == '' || trim(cemail.value) == null)
   	{
      	alert('Please enter your Email address!');
      	cemail.focus();
      	return false;
   	}
   	else if(!isEmail(trim(cemail.value)))
   	{
      	alert('Email address is not valid!');
      	cemail.focus();
      	return false;
   	}
	else if(!isPhone(ctelephone.value) && ctelephone.value != '')
   	{
	 	alert("Please Enter a Valid Phone Number! \n The phone number contains illegal characters or make sure you included an area code.");
	 	ctelephone.focus();
	 	return false;
   	}   	
	else
   	{
	  	clname.value = trim(clname.value);
	  	ctelephone.value = trim(ctelephone.value);
      	cemail.value = trim(cemail.value);
      	return true;
   	}
}

function trim(str)
{
	return str.replace(/^\s+|\s+$/g,'');
}

function isPhone(str)
{
	var stripped = str.replace(/[\(\)\.\-\ ]/g, '');
	if (isNaN(parseInt(stripped))) return false;
	if (!(stripped.length >= 10)) return false;
 	return true;
}

function isEmail(str)
{
 	var regex = /^[-_.a-z0-9]+@(([-_a-z0-9]+\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i;
 	return regex.test(str);
}